MySQL调优脚本tuning-primer.sh使用说明

运行 tuning-primer.sh显示说明

SLOW QUERIES	慢查询检查
SLOW QUERIESThe slow query log is enabled.	说明我已经启用了慢查询记录功能。也就是参数 slow_query_log = 1
Current long_query_time = 5.000000 sec.	慢查询的阀值时间。也就是参数 long_query_time = 5
You have 17 out of 638844 that take longer than 5.000000 sec. to complete	说明慢查询日志中记录了17条查询时间超过5秒的语句。 slow_query_log_file=/data/ats_db/mysql-slow.log设置慢查询日志路径。使用 mysqldumpslow命令查询慢日志
Your long_query_time seems to be fine	慢查询阀值时间设置得在推荐的范围内
BINARY UPDATE LOG	更新二进制日志文件
The binary update log is enabled	这项说明启用了bin-log日志功能。参数 log-bin = /data/ats_db/mysql-bin
Binlog sync is not enabled, you could loose binlog records during a server crash	没有启用 sync_binlog 选项。也即是将二进制日志实时写入到磁盘通过 sync_binlog=1来指定
WORKER THREADS	工作线程
Current thread_cache_size = 8	当前线程缓存大小。 thread_concurrency = 8
Current threads_cached = 7	Show status like ‘threads_cached’
Current threads_per_sec = 0	脚本先执行Show status like ‘Threads_cached’查看当前的线程创建情况，然后sleep 1后在执行相同的命令，最终后者减去前者的数就是每秒线程创建数。
Historic threads_per_sec = 0	该值是使用Threads_cached /uptime获得的。
Your thread_cache_size is fine
MAX CONNECTIONS	最大连接数
Current max_connections = 1024	当前配置文件中设置的并发连接数
Current threads_connected = 2	当前线程连接诶数。 show status like ‘Threads_connected’
Historic max_used_connections = 4	show status like ‘Max_used_connections’;
The number of used connections is 0% of the configured maximum.	这个值使用 Max_used_connections*100/ max_connections得出。
You are using less than 10% of your configured max_connections.Lowering max_connections could help to avoid an over-allocation of memory See “MEMORY USAGE” section to make sure you are not over-allocating	Max_used_connections的值不足max_connections值的10%。设置合适的max_connections值有助于节省内存。
MEMORY USAGE	内存使用
Max Memory Ever Allocated : 841 M	Max Memory Ever Allocated = max_memory
Configured Max Per-thread Buffers : 28.40 G	Configured Max Per-thread Buffers = per_thread_buffers
Configured Max Global Buffers : 586 M	Configured Max Global Buffers = global_buffers
Configured Max Memory Limit : 28.97 G	Configured Max Memory Limit = total_memory 这一项很重要，他是将各个缓存的大小累加，然后同max_connections相乘，从而得出当达到max_connections后需要分配的内存有多少。我这里由于max_connections写得很大，造成了最大内存限制超过了真实内存很多，所以建议不要随意增大max_connections的值。减小 max_connections的值，最终保证最大内存限制在真实内存的90%以下。
Physical Memory : 7.79 G	实际物理内存
Max memory limit exceeds 90% of physical memory
per_thread_buffers (read_buffer_size+read_rnd_buffer_size +sort_buffer_size+thread_stack+ join_buffer_size+binlog_cache_size)*max_connections per_thread_max_buffers (read_buffer_size+read_rnd_buffer_size +sort_buffer_size+thread_stack +join_buffer_size+binlog_cache_size)*max_used_connections max_used_connections=$(mysql -Bse "show status like 'Max_used_connections'" | awk '{ print $2 }') global_buffers innodb_buffer_pool_size+innodb_additional_mem_pool_size+innodb_log_buffer_size+ key_buffer_size+query_cache_size max_memory= global_buffers+ per_thread_max_buffers total_memory= global_buffers+per_thread_buffers
KEY BUFFER	Key 缓冲
Current MyISAM index space = 222 K	当前数据库MyISAM表中索引占用磁盘空间
Current key_buffer_size = 512 M	MySQL配置文件中key_buffer_size 设置的大小
Key cache miss rate is 1 : 3316	Key_read_requests/ Key_reads 这里说明3316次读取请求中有1次丢失(也就是说1次读取磁盘)
Key buffer free ratio = 81 %	key_blocks_unused * key_cache_block_size / key_buffer_size * 100
Your key_buffer_size seems to be fine
QUERY CACHE	Query 缓存
Query cache is enabled	该项说明 我们指定了query_cache_size 的值。如果query_cache_size=0的话这里给出的提示是： Query cache is supported but not enabled Perhaps you should set the query_cache_size
Current query_cache_size = 64 M	当前系统query_cache_size 值大小 [F]
Current query_cache_used = 1 M	query_cache_used =query_cache_size-qcache_free_memory
Current query_cache_limit = 128 M	变量 query_cache_limit 大小
Current Query cache Memory fill ratio = 1.79 %	query_cache_used/query_cache_size *100%
Current query_cache_min_res_unit = 4 K	show variables like ‘query_cache_min_res_unit’;
Your query_cache_size seems to be too high. Perhaps you can use these resources elsewhere	这项给出的结论是query_cache_size的值设置的有些过高。其比对标准是 “Query cache Memory fill ratio”的值如果小于<25%就会给出这个提示。可以将这些资源应用到其他的地方
MySQL won’t cache query results that are larger than query_cache_limit in size	MySQL不会将大于query_cache_limit的查询结果进行缓存
show status like ‘Qcache%’;Qcache_free_blocks        10 Qcache_free_memory        65891984 Qcache_hits            14437 Qcache_inserts            707 Qcache_lowmem_prunes    0 Qcache_not_cached        216 Qcache_queries_in_cache    540 Qcache_total_blocks        1191
SORT OPERATIONS	SORT 选项
Current sort_buffer_size = 6 M	show variables like ’sort_buffer%’;
Current read_rnd_buffer_size = 16 M	show variables like ‘read_rnd_buffer_size%’;
Sort buffer seems to be fine
JOINS	JOINS
Current join_buffer_size = 132.00 K	show variables like ‘join_buffer_size%’;join_buffer_size=join_buffer_size+4kb
You have had 6 queries where a join could not use an index properly	这里的6是通过 show status like ‘Select_full_join’; 获得的
You should enable “log-queries-not-using-indexes” Then look for non indexed joins in the slow query log. If you are unable to optimize your queries you may want to increase your join_buffer_size to accommodate larger joins in one pass.Note! This script will still suggest raising the join_buffer_size when ANY joins not using indexes are found.	你需要启用 “log-queries-not-using-indexes” 然后在慢查询日志中看是否有取消索引的joins语句。如果不优化查询语句的话，则需要增大join_buffer_size。
OPEN FILES LIMIT	文件打开数限制
Current open_files_limit = 1234 files	show variables like ‘open_files_limit%’;
The open_files_limit should typically be set to at least 2x-3xthat of table_cache if you have heavy MyISAM usage.	如果系统中有很多的MyISAM类型的表，则建议将open_files_limit 设置为2X~3X的table_open_cache show status like ‘Open_files’;open_files_ratio= open_files*100/open_files_limit 如果open_files_ratio 超过75% 则需要加大open_files_limit
Your open_files_limit value seems to be fine
TABLE CACHE	TABLE 缓存
Current table_open_cache = 512 tables	show variables like ‘table_open_cache’;
Current table_definition_cache = 256 tables	show variables like ‘ table_definition_cache ‘;
You have a total of 368 tables	SELECTCOUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE=’BASE TABLE’
You have 371 open tables.	show status like ‘Open_tables’;
The table_cache value seems to be fine	Open_tables /table_open_cache*100% < 95%
You should probably increase your table_definition_cache value.	table_cache_hit_rate =open_tables*100/opened_tables
TEMP TABLES	临时表
Current max_heap_table_size = 16 M	show variables like ‘max_heap_table_size’;
Current tmp_table_size = 16 M	show variables like ‘tmp_table_size’;
Of 285 temp tables, 11% were created on disk	Created_tmp_tables=285created_tmp_disk_tables*100/ (created_tmp_tables+created_tmp_disk_tables)=11%
Created disk tmp tables ratio seems fine
TABLE SCANS	扫描表
Current read_buffer_size = 6 M	show variables like ‘read_buffer_size’;
Current table scan ratio = 9 : 1	read_rnd_next =show global status like ‘Handler_read_rnd_next’; com_select= show global status like ‘Com_select’; full_table_scans=read_rnd_next/com_select Current table scan ratio = full_table_scans : 1″ 如果表扫描率超过4000，说明进行了太多表扫描，很有可能索引没有建好，增加read_buffer_size值会有一些好处，但最好不要超过8MB。
read_buffer_size seems to be fine
TABLE LOCKING	TABLE LOCKING
Current Lock Wait ratio = 0 : 5617	show global status like’Table_locks_waited’; show global status like ‘Questions’; 如果 Table_locks_waited=0 Current Lock Wait ratio = 0: Questions
Your table locking seems to be fine

获取脚本的路径为：

https://code.launchpad.net/mysql-tuning-primer

脚本内容如下：

#!/bin/sh


# vim: ts=8
#########################################################################
# #
# MySQL performance tuning primer script #
# Writen by: Matthew Montgomery #
# Report bugs to: https://bugs.launchpad.net/mysql-tuning-primer #
# Inspired by: MySQLARd (http://gert.sos.be/demo/mysqlar/) #
# Version: 1.6-r1 Released: 2011-08-06 #
# Licenced under GPLv2                                            #
# #
#########################################################################


#########################################################################
# #
# Usage: ./tuning-primer.sh [ mode ] #
# #
# Available Modes: #
# all : perform all checks (default) #
# prompt : prompt for login credintials and socket #
# and execution mode #
# mem, memory : run checks for tunable options which #
# effect memory usage #
# disk, file : run checks for options which effect #
# i/o performance or file handle limits #
# innodb : run InnoDB checks /* to be improved */ # 
# misc : run checks for that don't categorise #
# well Slow Queries, Binary logs, #
# Used Connections and Worker Threads #
#########################################################################
# #
# Set this socket variable ONLY if you have multiple instances running # 
# or we are unable to find your socket, and you don't want to to be #
# prompted for input each time you run this script. #
# #
#########################################################################
socket=


export black='\033[0m'
export boldblack='\033[1;0m'
export red='\033[31m'
export boldred='\033[1;31m'
export green='\033[32m'
export boldgreen='\033[1;32m'
export yellow='\033[33m'
export boldyellow='\033[1;33m'
export blue='\033[34m'
export boldblue='\033[1;34m'
export magenta='\033[35m'
export boldmagenta='\033[1;35m'
export cyan='\033[36m'
export boldcyan='\033[1;36m'
export white='\033[37m'
export boldwhite='\033[1;37m'




cecho ()


## -- Function to easliy print colored text -- ##

# Color-echo.
# Argument $1 = message
# Argument $2 = color
{
local default_msg="No message passed."


message=${1:-$default_msg} # Defaults to default message.


#change it for fun
#We use pure names
color=${2:-black} # Defaults to black, if not specified.


case $color in
black)
printf "$black" ;;
boldblack)
printf "$boldblack" ;;
red)
printf "$red" ;;
boldred)
printf "$boldred" ;;
green)
printf "$green" ;;
boldgreen)
printf "$boldgreen" ;;
yellow)
printf "$yellow" ;;
boldyellow)
printf "$boldyellow" ;;
blue)
printf "$blue" ;;
boldblue)
printf "$boldblue" ;;
magenta)
printf "$magenta" ;;
boldmagenta)
printf "$boldmagenta" ;;
cyan)
printf "$cyan" ;;
boldcyan)
printf "$boldcyan" ;;
white)
printf "$white" ;;
boldwhite)
printf "$boldwhite" ;;
esac
  printf "%s\n"  "$message"
  tput sgr0 # Reset to normal.
  printf "$black"


return
}




cechon ()


## -- Function to easliy print colored text -- ##


# Color-echo.
# Argument $1 = message
# Argument $2 = color
{
local default_msg="No message passed."
# Doesn't really need to be a local variable.


message=${1:-$default_msg} # Defaults to default message.


#change it for fun
#We use pure names
color=${2:-black} # Defaults to black, if not specified.


case $color in
black)
printf "$black" ;;
boldblack)
printf "$boldblack" ;;
red)
printf "$red" ;;
boldred)
printf "$boldred" ;;
green)
printf "$green" ;;
boldgreen)
printf "$boldgreen" ;;
yellow)
printf "$yellow" ;;
boldyellow)
printf "$boldyellow" ;;
blue)
printf "$blue" ;;
boldblue)
printf "$boldblue" ;;
magenta)
printf "$magenta" ;;
boldmagenta)
printf "$boldmagenta" ;;
cyan)
printf "$cyan" ;;
boldcyan)
printf "$boldcyan" ;;
white)
printf "$white" ;;
boldwhite)
printf "$boldwhite" ;;
esac
  printf "%s"  "$message"
  tput sgr0 # Reset to normal.
  printf "$black"


return
}




print_banner () {


## -- Banner -- ##


cecho " -- MYSQL PERFORMANCE TUNING PRIMER --" boldblue
cecho "     - By: Matthew Montgomery -" black


}


## -- Find the location of the mysql.sock file -- ##


check_for_socket () {
if [ -z "$socket" ] ; then
# Use ~/my.cnf version
if [ -f ~/.my.cnf ] ; then
cnf_socket=$(grep ^socket ~/.my.cnf | awk -F \= '{ print $2 }' | head -1)
fi
if [ -S "$cnf_socket" ] ; then
socket=$cnf_socket
elif [ -S /var/lib/mysql/mysql.sock ] ; then
socket=/var/lib/mysql/mysql.sock
elif [ -S /var/run/mysqld/mysqld.sock ] ; then
socket=/var/run/mysqld/mysqld.sock
elif [ -S /tmp/mysql.sock ] ; then
socket=/tmp/mysql.sock
else
if [ -S "$ps_socket" ] ; then
socket=$ps_socket
fi
fi
fi
if [ -S "$socket" ] ; then
echo UP > /dev/null
else
cecho "No valid socket file \"$socket\" found!" boldred
cecho "The mysqld process is not running or it is installed in a custom location." red
cecho "If you are sure mysqld is running, execute script in \"prompt\" mode or set " red
cecho "the socket= variable at the top of this script" red
exit 1
fi
}




check_for_plesk_passwords () {


## -- Check for the existance of plesk and login using it's credentials -- ##


if [ -f /etc/psa/.psa.shadow ] ; then
       mysql="mysql -S $socket -u admin -p$(cat /etc/psa/.psa.shadow)"
       mysqladmin="mysqladmin -S $socket -u admin -p$(cat /etc/psa/.psa.shadow)"
else
       mysql="mysql"
       mysqladmin="mysqladmin"
       # mysql="mysql -S $socket"
       # mysqladmin="mysqladmin -S $socket"
fi
}


check_mysql_login () {


## -- Test for running mysql -- ##


is_up=$($mysqladmin ping 2>&1)
if [ "$is_up" = "mysqld is alive" ] ; then
echo UP > /dev/null
# echo $is_up
elif [ "$is_up" != "mysqld is alive" ] ; then
printf "\n"
cecho "Using login values from ~/.my.cnf" 
cecho "- INITIAL LOGIN ATTEMPT FAILED -" boldred
if [ -z $prompted ] ; then
find_webmin_passwords
else
return 1
fi

else 
cecho "Unknow exit status" red
exit -1
fi
}


final_login_attempt () {
        is_up=$($mysqladmin ping 2>&1)
        if [ "$is_up" = "mysqld is alive" ] ; then
                echo UP > /dev/null
        elif [ "$is_up" != "mysqld is alive" ] ; then
                cecho "- FINAL LOGIN ATTEMPT FAILED -" boldred
cecho "Unable to log into socket: $socket" boldred
                exit 1
        fi
}


second_login_failed () {


## -- create a ~/.my.cnf and exit when all else fails -- ##


cecho "Could not auto detect login info!"
cecho "Found potential sockets: $found_socks"
cecho "Using: $socket" red
read -p "Would you like to provide a different socket?: [y/N] " REPLY
case $REPLY in 
yes | y | Y | YES)
read -p "Socket: " socket
;;
esac
read -p "Do you have your login handy ? [y/N] : " REPLY
case $REPLY in 
yes | y | Y | YES)
answer1='yes'
read -p "User: " user
read -rp "Password: " pass
if [ -z $pass ] ; then
export mysql="$mysql -S$socket -u$user"
export mysqladmin="$mysqladmin -S$socket -u$user"
else
export mysql="$mysql -S$socket -u$user -p$pass"
export mysqladmin="$mysqladmin -S$socket -u$user -p$pass"
fi
;;
*)
cecho "Please create a valid login to MySQL"
cecho "Or, set correct values for  'user=' and 'password=' in ~/.my.cnf"
;;
esac
cecho " "
read -p "Would you like me to create a ~/.my.cnf file for you? [y/N] : " REPLY
        case $REPLY in
       yes | y | Y | YES)
answer2='yes'
if [ ! -f ~/.my.cnf ] ; then
umask 077
printf "[client]\nuser=$user\npassword=$pass\nsocket=$socket" > ~/.my.cnf
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
else
printf "\n"
cecho "~/.my.cnf already exists!" boldred
printf "\n"
read -p "Replace ? [y/N] : " REPLY
if [ "$REPLY" = 'y' ] || [ "$REPLY" = 'Y' ] ; then 
printf "[client]\nuser=$user\npassword=$pass\socket=$socket" > ~/.my.cnf
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
else
cecho "Please set the 'user=' and 'password=' and 'socket=' values in ~/.my.cnf"
exit 1
fi
fi
;;
*)
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
;;
esac
}


find_webmin_passwords () {


## -- populate the .my.cnf file using values harvested from Webmin -- ##


cecho "Testing for stored webmin passwords:"
if [ -f /etc/webmin/mysql/config ] ; then
user=$(grep ^login= /etc/webmin/mysql/config | cut -d "=" -f 2)
pass=$(grep ^pass= /etc/webmin/mysql/config | cut -d "=" -f 2)
if [  $user ] && [ $pass ] && [ ! -f ~/.my.cnf  ] ; then
cecho "Setting login info as User: $user Password: $pass"
touch ~/.my.cnf
chmod 600 ~/.my.cnf
printf "[client]\nuser=$user\npassword=$pass" > ~/.my.cnf 
cecho "Retrying login"
is_up=$($mysqladmin ping 2>&1)
if [ "$is_up" = "mysqld is alive"  ] ; then
echo UP > /dev/null
else
second_login_failed
fi
echo
else
second_login_failed
echo
fi
else
cecho " None Found" boldred
second_login_failed
fi
}


#########################################################################
# #
#  Function to pull MySQL status variable #
# #
#  Call using : #
# mysql_status \'Mysql_status_variable\' bash_dest_variable #
# #
#########################################################################


mysql_status () {
local status=$($mysql -Bse "show /*!50000 global */ status like $1" | awk '{ print $2 }')
export "$2"=$status
}


#########################################################################
# #
#  Function to pull MySQL server runtime variable #
# #
#  Call using : #
# mysql_variable \'Mysql_server_variable\' bash_dest_variable #
# - OR - #
# mysql_variableTSV \'Mysql_server_variable\' bash_dest_variable #
# #
#########################################################################


mysql_variable () {
local variable=$($mysql -Bse "show /*!50000 global */ variables like $1" | awk '{ print $2 }')
export "$2"=$variable
}
mysql_variableTSV () {
        local variable=$($mysql -Bse "show /*!50000 global */ variables like $1" | awk -F \t '{ print $2 }')
        export "$2"=$variable
}


float2int () {
        local variable=$(echo "$1 / 1" | bc -l)
        export "$2"=$variable
}


divide () {


# -- Divide two intigers -- #


usage="$0 dividend divisor '$variable' scale"
if [ $1 -ge 1 ] ; then
dividend=$1
else
cecho "Invalid Dividend" red
echo $usage
exit 1
fi
if [ $2 -ge 1 ] ; then
divisor=$2
else
cecho "Invalid Divisor" red
echo $usage
exit 1
fi
if [ ! -n $3 ] ; then
cecho "Invalid variable name" red
echo $usage
exit 1
fi
if [ -z $4 ] ; then
scale=2
elif [ $4 -ge 0 ] ; then
scale=$4
else
cecho "Invalid scale" red
echo $usage
exit 1
fi
export $3=$(echo "scale=$scale; $dividend / $divisor" | bc -l)
}


human_readable () {


#########################################################################
# #
#  Convert a value in to human readable size and populate a variable #
#  with the result. #
# #
#  Call using: #
# human_readable $value 'variable name' [ places of precision] #
# #
#########################################################################


## value=$1
## variable=$2
scale=$3


if [ $1 -ge 1073741824 ] ; then
if [ -z $3 ] ; then
scale=2
fi
divide $1 1073741824 "$2" $scale
unit="G"
elif [ $1 -ge 1048576 ] ; then
if [ -z $3 ] ; then 
scale=0
fi
divide $1 1048576 "$2" $scale
       unit="M"
elif [ $1 -ge 1024 ] ; then
if [ -z $3 ] ; then
scale=0
fi
divide $1 1024 "$2" $scale
       unit="K"
else
export "$2"=$1
       unit="bytes"
fi
# let "$2"=$HR
}


human_readable_time () {


########################################################################
#       #
# Function to produce human readable time                        #
#       #
########################################################################


usage="$0 seconds 'variable'"
if [ -z $1 ] || [ -z $2 ] ; then
cecho $usage red
exit 1
fi
days=$(echo "scale=0 ; $1 / 86400" | bc -l)
remainder=$(echo "scale=0 ; $1 % 86400" | bc -l)
hours=$(echo "scale=0 ; $remainder / 3600" | bc -l)
remainder=$(echo "scale=0 ; $remainder % 3600" | bc -l)
minutes=$(echo "scale=0 ; $remainder / 60" | bc -l)
seconds=$(echo "scale=0 ; $remainder % 60" | bc -l)
export $2="$days days $hours hrs $minutes min $seconds sec"
}


check_mysql_version () {


## -- Print Version Info -- ##


mysql_variable \'version\' mysql_version
mysql_variable \'version_compile_machine\' mysql_version_compile_machine

if [ "$mysql_version_num" -lt 050000 ]; then
cecho "MySQL Version $mysql_version $mysql_version_compile_machine is EOL please upgrade to MySQL 4.1 or later" boldred
else
cecho "MySQL Version $mysql_version $mysql_version_compile_machine"
fi




}


post_uptime_warning () {


#########################################################################
# #
#  Present a reminder that mysql must run for a couple of days to #
#  build up good numbers in server status variables before these tuning #
#  suggestions should be used. #
# #
#########################################################################


mysql_status \'Uptime\' uptime
mysql_status \'Threads_connected\' threads
queries_per_sec=$(($questions/$uptime))
human_readable_time $uptime uptimeHR


cecho "Uptime = $uptimeHR"
cecho "Avg. qps = $queries_per_sec"
cecho "Total Questions = $questions"
cecho "Threads Connected = $threads"
echo


if [ $uptime -gt 172800 ] ; then
cecho "Server has been running for over 48hrs."
cecho "It should be safe to follow these recommendations"
else
cechon "Warning: " boldred
cecho "Server has not been running for at least 48hrs." boldred
cecho "It may not be safe to use these recommendations" boldred


fi
echo ""
cecho "To find out more information on how each of these" red
cecho "runtime variables effects performance visit:" red
if [ "$major_version" = '3.23' ] || [ "$major_version" = '4.0' ] || [ "$major_version" = '4.1' ] ; then
cecho "http://dev.mysql.com/doc/refman/4.1/en/server-system-variables.html" boldblue
elif [ "$major_version" = '5.0' ] || [ "$mysql_version_num" -gt '050100' ]; then
cecho "http://dev.mysql.com/doc/refman/$major_version/en/server-system-variables.html" boldblue
else
cecho "UNSUPPORTED MYSQL VERSION" boldred
exit 1
fi
cecho "Visit http://www.mysql.com/products/enterprise/advisors.html" boldblue
cecho "for info about MySQL's Enterprise Monitoring and Advisory Service" boldblue
}


check_slow_queries () {


## -- Slow Queries -- ## 


cecho "SLOW QUERIES" boldblue


mysql_status \'Slow_queries\' slow_queries
mysql_variable \'long_query_time\' long_query_time
mysql_variable \'log%queries\' log_slow_queries

prefered_query_time=5
if [ -e /etc/my.cnf ] ; then
if [ -z $log_slow_queries ] ; then
log_slow_queries=$(grep log-slow-queries /etc/my.cnf)
fi
fi


if [ "$log_slow_queries" = 'ON' ] ; then
cecho "The slow query log is enabled."
elif [ "$log_slow_queries" = 'OFF' ] ; then
cechon "The slow query log is "
cechon "NOT" boldred
cecho " enabled."
elif [ -z $log_slow_queries ] ; then
cechon "The slow query log is "
cechon "NOT" boldred
cecho " enabled."
else
cecho "Error: $log_slow_queries" boldred
fi
cecho "Current long_query_time = $long_query_time sec."
cechon "You have "
cechon "$slow_queries" boldred 
cechon " out of "
cechon "$questions" boldred
cecho " that take longer than $long_query_time sec. to complete"

float2int long_query_time long_query_timeInt


if [ $long_query_timeInt -gt $prefered_query_time ] ; then
                cecho "Your long_query_time may be too high, I typically set this under $prefered_query_time sec." red
else
cecho "Your long_query_time seems to be fine" green
fi 


}


check_binary_log () {


## -- Binary Log -- ##


cecho "BINARY UPDATE LOG" boldblue


mysql_variable \'log_bin\' log_bin
mysql_variable \'max_binlog_size\' max_binlog_size
mysql_variable \'expire_logs_days\' expire_logs_days
mysql_variable \'sync_binlog\' sync_binlog
#  mysql_variable \'max_binlog_cache_size\' max_binlog_cache_size


if [ "$log_bin" = 'ON' ] ; then
cecho "The binary update log is enabled"
if [ -z "$max_binlog_size" ] ; then
cecho "The max_binlog_size is not set. The binary log will rotate when it reaches 1GB." red
fi
if [ "$expire_logs_days" -eq 0 ] ; then
cecho "The expire_logs_days is not set." boldred
cechon "The mysqld will retain the entire binary log until " red
cecho "RESET MASTER or PURGE MASTER LOGS commands are run manually" red
cecho "Setting expire_logs_days will allow you to remove old binary logs automatically"  yellow
cecho "See http://dev.mysql.com/doc/refman/$major_version/en/purge-master-logs.html" yellow
fi
if [ "$sync_binlog" = 0 ] ; then
cecho "Binlog sync is not enabled, you could loose binlog records during a server crash" red
fi
else
cechon "The binary update log is "
cechon "NOT " boldred
cecho "enabled."
cecho "You will not be able to do point in time recovery" red
cecho "See http://dev.mysql.com/doc/refman/$major_version/en/point-in-time-recovery.html" yellow
fi
}


check_used_connections () {


## -- Used Connections -- ##


mysql_variable \'max_connections\' max_connections
mysql_status \'Max_used_connections\' max_used_connections
mysql_status \'Threads_connected\' threads_connected


connections_ratio=$(($max_used_connections*100/$max_connections))


cecho "MAX CONNECTIONS" boldblue
cecho "Current max_connections = $max_connections"
cecho "Current threads_connected = $threads_connected"
cecho "Historic max_used_connections = $max_used_connections"
cechon "The number of used connections is "
if [ $connections_ratio -ge 85 ] ; then
txt_color=red
error=1
elif [ $connections_ratio -le 10 ] ; then
txt_color=red
error=2
else
txt_color=green
error=0
fi
# cechon "$max_used_connections " $txt_color
# cechon "which is "
cechon "$connections_ratio% " $txt_color
cecho "of the configured maximum."


if [ $error -eq 1 ] ; then
cecho "You should raise max_connections" $txt_color
elif [ $error -eq 2 ] ; then
cecho "You are using less than 10% of your configured max_connections." $txt_color
cecho "Lowering max_connections could help to avoid an over-allocation of memory" $txt_color
cecho "See \"MEMORY USAGE\" section to make sure you are not over-allocating" $txt_color
else 
cecho "Your max_connections variable seems to be fine." $txt_color
fi
unset txt_color
}


check_threads() {


## -- Worker Threads -- ##


cecho "WORKER THREADS" boldblue


mysql_status \'Threads_created\' threads_created1
sleep 1
mysql_status \'Threads_created\' threads_created2


mysql_status \'Threads_cached\' threads_cached
mysql_status \'Uptime\' uptime
mysql_variable \'thread_cache_size\' thread_cache_size


historic_threads_per_sec=$(($threads_created1/$uptime))
current_threads_per_sec=$(($threads_created2-$threads_created1))


cecho "Current thread_cache_size = $thread_cache_size"
cecho "Current threads_cached = $threads_cached"
cecho "Current threads_per_sec = $current_threads_per_sec"
cecho "Historic threads_per_sec = $historic_threads_per_sec"


if [ $historic_threads_per_sec -ge 2 ] && [ $threads_cached -le 1 ] ; then
cecho "Threads created per/sec are overrunning threads cached" red
cecho "You should raise thread_cache_size" red
elif [ $current_threads_per_sec -ge 2 ] ; then
cecho "Threads created per/sec are overrunning threads cached" red
cecho "You should raise thread_cache_size" red
else
cecho "Your thread_cache_size is fine" green
fi
}


check_key_buffer_size () {


## -- Key buffer Size -- ##


cecho "KEY BUFFER" boldblue


mysql_status \'Key_read_requests\' key_read_requests
mysql_status \'Key_reads\' key_reads
mysql_status \'Key_blocks_used\' key_blocks_used
mysql_status \'Key_blocks_unused\' key_blocks_unused
mysql_variable \'key_cache_block_size\' key_cache_block_size
mysql_variable \'key_buffer_size\' key_buffer_size
        mysql_variable \'datadir\' datadir
        mysql_variable \'version_compile_machine\' mysql_version_compile_machine
myisam_indexes=$($mysql -Bse "/*!50000 SELECT IFNULL(SUM(INDEX_LENGTH),0) from information_schema.TABLES where ENGINE='MyISAM' */")


if [ -z $myisam_indexes ] ; then
myisam_indexes=$(find $datadir -name '*.MYI' -exec du $duflags '{}' \; 2>&1 | awk '{ s += $1 } END { printf("%.0f\n", s )}')
fi


        if [ $key_reads -eq 0 ] ; then
                cecho "No key reads?!" boldred
                cecho "Seriously look into using some indexes" red
                key_cache_miss_rate=0
                key_buffer_free=$(echo "$key_blocks_unused * $key_cache_block_size / $key_buffer_size * 100" | bc -l )
                key_buffer_freeRND=$(echo "scale=0; $key_buffer_free / 1" | bc -l)
        else
                key_cache_miss_rate=$(($key_read_requests/$key_reads))
                if [ ! -z $key_blocks_unused ] ; then
key_buffer_free=$(echo "$key_blocks_unused * $key_cache_block_size / $key_buffer_size * 100" | bc -l )
                key_buffer_freeRND=$(echo "scale=0; $key_buffer_free / 1" | bc -l)
                else
                        key_buffer_free='Unknown'
                        key_buffer_freeRND=75
                fi
        fi


human_readable $myisam_indexes myisam_indexesHR
cecho "Current MyISAM index space = $myisam_indexesHR $unit" 


human_readable  $key_buffer_size key_buffer_sizeHR
cecho "Current key_buffer_size = $key_buffer_sizeHR $unit"
cecho "Key cache miss rate is 1 : $key_cache_miss_rate"
cecho "Key buffer free ratio = $key_buffer_freeRND %" 


if [ "$major_version" = '5.1' ] && [ $mysql_version_num -lt 050123 ] ; then
if [ $key_buffer_size -ge 4294967296 ] && ( echo "x86_64 ppc64 ia64 sparc64 i686" | grep -q $mysql_version_compile_machine ) ; then
cecho "Using key_buffer_size > 4GB will cause instability in versions prior to 5.1.23 " boldred
cecho "See Bug#5731, Bug#29419, Bug#29446" boldred
fi
fi
if [ "$major_version" = '5.0' ] && [ $mysql_version_num -lt 050052 ] ; then
if [ $key_buffer_size -ge 4294967296 ] && ( echo "x86_64 ppc64 ia64 sparc64 i686" | grep -q $mysql_version_compile_machine ) ; then
cecho "Using key_buffer_size > 4GB will cause instability in versions prior to 5.0.52 " boldred
cecho "See Bug#5731, Bug#29419, Bug#29446" boldred
fi
fi
if [ "$major_version" = '4.1' -o "$major_version" = '4.0' ] && [ $key_buffer_size -ge 4294967296 ] && ( echo "x86_64 ppc64 ia64 sparc64 i686" | grep -q $mysql_version_compile_machine ) ; then
cecho "Using key_buffer_size > 4GB will cause instability in versions prior to 5.0.52 " boldred
cecho "Reduce key_buffer_size to a safe value" boldred
cecho "See Bug#5731, Bug#29419, Bug#29446" boldred
fi


if [ $key_cache_miss_rate -le 100 ] && [ $key_cache_miss_rate -gt 0 ] && [ $key_buffer_freeRND -le 20 ]; then
cecho "You could increase key_buffer_size" boldred
cecho "It is safe to raise this up to 1/4 of total system memory;"
cecho "assuming this is a dedicated database server."
elif [ $key_buffer_freeRND -le 20 ] && [ $key_buffer_size -le $myisam_indexes ] ; then
cecho "You could increase key_buffer_size" boldred
cecho "It is safe to raise this up to 1/4 of total system memory;"
cecho "assuming this is a dedicated database server."
elif [ $key_cache_miss_rate -ge 10000 ] || [ $key_buffer_freeRND -le 50  ] ; then
cecho "Your key_buffer_size seems to be too high." red 
cecho "Perhaps you can use these resources elsewhere" red
else
cecho "Your key_buffer_size seems to be fine" green
fi
}


check_query_cache () {


## -- Query Cache -- ##


cecho "QUERY CACHE" boldblue


mysql_variable \'version\' mysql_version
mysql_variable \'query_cache_size\' query_cache_size
mysql_variable \'query_cache_limit\' query_cache_limit
mysql_variable \'query_cache_min_res_unit\' query_cache_min_res_unit
mysql_status \'Qcache_free_memory\' qcache_free_memory
mysql_status \'Qcache_total_blocks\' qcache_total_blocks
mysql_status \'Qcache_free_blocks\' qcache_free_blocks
mysql_status \'Qcache_lowmem_prunes\' qcache_lowmem_prunes


if [ -z $query_cache_size ] ; then
cecho "You are using MySQL $mysql_version, no query cache is supported." red
cecho "I recommend an upgrade to MySQL 4.1 or better" red
elif [ $query_cache_size -eq 0 ] ; then
cecho "Query cache is supported but not enabled" red
cecho "Perhaps you should set the query_cache_size" red
else
qcache_used_memory=$(($query_cache_size-$qcache_free_memory))
qcache_mem_fill_ratio=$(echo "scale=2; $qcache_used_memory * 100 / $query_cache_size" | bc -l)
qcache_mem_fill_ratioHR=$(echo "scale=0; $qcache_mem_fill_ratio / 1" | bc -l)


cecho "Query cache is enabled" green
human_readable $query_cache_size query_cache_sizeHR
cecho "Current query_cache_size = $query_cache_sizeHR $unit"
human_readable $qcache_used_memory qcache_used_memoryHR
cecho "Current query_cache_used = $qcache_used_memoryHR $unit"
human_readable $query_cache_limit query_cache_limitHR
cecho "Current query_cache_limit = $query_cache_limitHR $unit"
cecho "Current Query cache Memory fill ratio = $qcache_mem_fill_ratio %"
if [ -z $query_cache_min_res_unit ] ; then
cecho "No query_cache_min_res_unit is defined.  Using MySQL < 4.1 cache fragmentation can be inpredictable" %yellow
else
human_readable $query_cache_min_res_unit query_cache_min_res_unitHR 
cecho "Current query_cache_min_res_unit = $query_cache_min_res_unitHR $unit"
fi
if [ $qcache_free_blocks -gt 2 ] && [ $qcache_total_blocks -gt 0 ] ; then
qcache_percent_fragmented=$(echo "scale=2; $qcache_free_blocks * 100 / $qcache_total_blocks" | bc -l)
qcache_percent_fragmentedHR=$(echo "scale=0; $qcache_percent_fragmented / 1" | bc -l)
if [ $qcache_percent_fragmentedHR -gt 20 ] ; then
cecho "Query Cache is $qcache_percent_fragmentedHR % fragmented" red
cecho "Run \"FLUSH QUERY CACHE\" periodically to defragment the query cache memory" red 
cecho "If you have many small queries lower 'query_cache_min_res_unit' to reduce fragmentation." red
fi
fi


if [ $qcache_mem_fill_ratioHR -le 25 ] ; then
               cecho "Your query_cache_size seems to be too high." red
               cecho "Perhaps you can use these resources elsewhere" red
fi
if [ $qcache_lowmem_prunes -ge 50 ] && [ $qcache_mem_fill_ratioHR -ge 80 ]; then
cechon "However, "
cechon "$qcache_lowmem_prunes " boldred
cecho "queries have been removed from the query cache due to lack of memory"
cecho "Perhaps you should raise query_cache_size" boldred
fi
cecho "MySQL won't cache query results that are larger than query_cache_limit in size" yellow
fi


}


check_sort_operations () {


## -- Sort Operations -- ##


cecho "SORT OPERATIONS" boldblue


mysql_status \'Sort_merge_passes\' sort_merge_passes
mysql_status \'Sort_scan\' sort_scan
mysql_status \'Sort_range\' sort_range
mysql_variable \'sort_buffer%\' sort_buffer_size 
mysql_variable \'read_rnd_buffer_size\' read_rnd_buffer_size 


total_sorts=$(($sort_scan+$sort_range))
if [ -z $read_rnd_buffer_size ] ; then
mysql_variable \'record_buffer\' read_rnd_buffer_size
fi


## Correct for rounding error in mysqld where 512K != 524288 ##
sort_buffer_size=$(($sort_buffer_size+8))
read_rnd_buffer_size=$(($read_rnd_buffer_size+8))


human_readable $sort_buffer_size sort_buffer_sizeHR
cecho "Current sort_buffer_size = $sort_buffer_sizeHR $unit"


human_readable $read_rnd_buffer_size read_rnd_buffer_sizeHR
cechon "Current " 
if [ "$major_version" = '3.23' ] ; then
cechon "record_rnd_buffer "
else
cechon "read_rnd_buffer_size "
fi
cecho "= $read_rnd_buffer_sizeHR $unit"


if [ $total_sorts -eq 0 ] ; then 
cecho "No sort operations have been performed"
passes_per_sort=0
fi
if [ $sort_merge_passes -ne 0 ] ; then
passes_per_sort=$(($sort_merge_passes/$total_sorts))
else
passes_per_sort=0
fi


if [ $passes_per_sort -ge 2 ] ; then
cechon "On average "
cechon "$passes_per_sort " boldred
cecho "sort merge passes are made per sort operation"
cecho "You should raise your sort_buffer_size"
cechon "You should also raise your "
if [ "$major_version" = '3.23' ] ; then 
cecho "record_rnd_buffer_size"
else
cecho "read_rnd_buffer_size"
fi
else
cecho "Sort buffer seems to be fine" green
fi
}


check_join_operations () {


## -- Joins -- ##


cecho "JOINS" boldblue


mysql_status \'Select_full_join\' select_full_join
mysql_status \'Select_range_check\' select_range_check
mysql_variable \'join_buffer%\' join_buffer_size

## Some 4K is dropped from join_buffer_size adding it back to make sane ##
## handling of human-readable conversion ## 


join_buffer_size=$(($join_buffer_size+4096))


human_readable $join_buffer_size join_buffer_sizeHR 2


cecho "Current join_buffer_size = $join_buffer_sizeHR $unit"
cecho "You have had $select_full_join queries where a join could not use an index properly"


if [ $select_range_check -eq 0 ] && [ $select_full_join -eq 0 ] ; then
cecho "Your joins seem to be using indexes properly" green
fi
if [ $select_full_join -gt 0 ] ; then
print_error='true'
raise_buffer='true'
fi
if [ $select_range_check -gt 0 ] ; then
cecho "You have had $select_range_check joins without keys that check for key usage after each row" red
print_error='true'
raise_buffer='true'
fi


## For Debuging ##
# print_error='true'
if [ $join_buffer_size -ge 4194304 ] ; then
cecho "join_buffer_size >= 4 M" boldred
cecho "This is not advised" boldred
raise_buffer=
fi


if [ $print_error ] ; then 
if [ "$major_version" = '3.23' ] || [ "$major_version" = '4.0' ] ; then
cecho "You should enable \"log-long-format\" "
elif [ "$mysql_version_num" -gt 040100 ]; then
cecho "You should enable \"log-queries-not-using-indexes\""
fi
cecho "Then look for non indexed joins in the slow query log."
if [ $raise_buffer ] ; then
cecho "If you are unable to optimize your queries you may want to increase your"
cecho "join_buffer_size to accommodate larger joins in one pass."
printf "\n"
cecho "Note! This script will still suggest raising the join_buffer_size when" boldred
cecho "ANY joins not using indexes are found." boldred
fi
fi


# XXX Add better tests for join_buffer_size pending mysql bug #15088  XXX #
}


check_tmp_tables () {


## -- Temp Tables -- ##


cecho "TEMP TABLES" boldblue


mysql_status \'Created_tmp_tables\' created_tmp_tables 
mysql_status \'Created_tmp_disk_tables\' created_tmp_disk_tables
mysql_variable \'tmp_table_size\' tmp_table_size
mysql_variable \'max_heap_table_size\' max_heap_table_size




if [ $created_tmp_tables -eq 0 ] ; then
tmp_disk_tables=0
else
tmp_disk_tables=$((created_tmp_disk_tables*100/(created_tmp_tables+created_tmp_disk_tables)))
fi
human_readable $max_heap_table_size max_heap_table_sizeHR
cecho "Current max_heap_table_size = $max_heap_table_sizeHR $unit"


human_readable $tmp_table_size tmp_table_sizeHR 
cecho "Current tmp_table_size = $tmp_table_sizeHR $unit"


cecho "Of $created_tmp_tables temp tables, $tmp_disk_tables% were created on disk"
if [ $tmp_table_size -gt $max_heap_table_size ] ; then
cecho "Effective in-memory tmp_table_size is limited to max_heap_table_size." yellow
fi
if [ $tmp_disk_tables -ge 25 ] ; then
cecho "Perhaps you should increase your tmp_table_size and/or max_heap_table_size" boldred
cecho "to reduce the number of disk-based temporary tables" boldred
cecho "Note! BLOB and TEXT columns are not allow in memory tables." yellow
cecho "If you are using these columns raising these values might not impact your " yellow
cecho  "ratio of on disk temp tables." yellow
else
cecho "Created disk tmp tables ratio seems fine" green
fi
}


check_open_files () {


## -- Open Files Limit -- ## 
cecho "OPEN FILES LIMIT" boldblue


mysql_variable \'open_files_limit\' open_files_limit
mysql_status   \'Open_files\' open_files

if [ -z $open_files_limit ] || [ $open_files_limit -eq 0 ] ; then
open_files_limit=$(ulimit -n)
cant_override=1
else
cant_override=0
fi
cecho "Current open_files_limit = $open_files_limit files"

open_files_ratio=$(($open_files*100/$open_files_limit))


cecho "The open_files_limit should typically be set to at least 2x-3x" yellow 
cecho "that of table_cache if you have heavy MyISAM usage." yellow
if [ $open_files_ratio -ge 75 ] ; then
cecho "You currently have open more than 75% of your open_files_limit" boldred
if [ $cant_override -eq 1 ] ; then
cecho "You should set a higer value for ulimit -u in the mysql startup script then restart mysqld" boldred
cecho "MySQL 3.23 users : This is just a guess based upon the current shell's ulimit -u value" yellow
elif [ $cant_override -eq 0 ] ; then
cecho "You should set a higher value for open_files_limit in my.cnf" boldred
else
cecho "ERROR can't determine if mysqld override of ulimit is allowed" boldred
exit 1
fi
else
cecho "Your open_files_limit value seems to be fine" green
fi





}


check_table_cache () {


## -- Table Cache -- ##


cecho "TABLE CACHE" boldblue


mysql_variable \'datadir\' datadir
mysql_variable \'table_cache\' table_cache


## /* MySQL +5.1 version of table_cache */ ## 
mysql_variable \'table_open_cache\' table_open_cache
mysql_variable \'table_definition_cache\' table_definition_cache


mysql_status \'Open_tables\' open_tables
mysql_status \'Opened_tables\' opened_tables
mysql_status \'Open_table_definitions\' open_table_definitions
 
table_count=$($mysql -Bse "/*!50000 SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE' */")


if [ -z "$table_count" ] ; then
if [ "$UID" != "$socket_owner" ] && [ "$UID" != "0" ] ; then
cecho "You are not '$socket_owner' or 'root'" red
cecho "I am unable to determine the table_count!" red
else
table_count=$(find $datadir 2>&1 | grep -c .frm$)
fi
fi
if [ $table_open_cache ] ; then
table_cache=$table_open_cache
fi


if [ $opened_tables -ne 0 ] && [ $table_cache -ne 0 ] ; then 
table_cache_hit_rate=$(($open_tables*100/$opened_tables))
table_cache_fill=$(($open_tables*100/$table_cache))
elif [ $opened_tables -eq 0 ] && [ $table_cache -ne 0 ] ; then
table_cache_hit_rate=100
table_cache_fill=$(($open_tables*100/$table_cache))
else
cecho "ERROR no table_cache ?!" boldred
exit 1
fi
if [ $table_cache ] && [ ! $table_open_cache ] ; then
cecho "Current table_cache value = $table_cache tables"
fi
if [ $table_open_cache ] ; then
cecho "Current table_open_cache = $table_open_cache tables"
cecho "Current table_definition_cache = $table_definition_cache tables"
fi
if [ $table_count ] ; then
cecho "You have a total of $table_count tables"
fi


if  [ $table_cache_fill -lt 95 ] ; then
cechon "You have "
cechon "$open_tables " green
cecho "open tables." 
cecho "The table_cache value seems to be fine" green
elif [ $table_cache_hit_rate -le 85 -o  $table_cache_fill -ge 95 ]; then
cechon "You have "
cechon "$open_tables " boldred
cecho "open tables."
cechon "Current table_cache hit rate is " 
cecho "$table_cache_hit_rate%" boldred
cechon ", while "
cechon "$table_cache_fill% " boldred
cecho "of your table cache is in use"
cecho "You should probably increase your table_cache" red
else
cechon "Current table_cache hit rate is "
cechon "$table_cache_hit_rate%" green
cechon ", while "
cechon "$table_cache_fill% " green
cecho "of your table cache is in use"
cecho "The table cache value seems to be fine" green
fi
if [ $table_definition_cache ] && [ $table_definition_cache -le $table_count ] && [ $table_count -ge 100 ] ; then
cecho "You should probably increase your table_definition_cache value." red
fi
}


check_table_locking () {


## -- Table Locking -- ##


cecho "TABLE LOCKING" boldblue


mysql_status \'Table_locks_waited\' table_locks_waited
mysql_status \'Table_locks_immediate\' table_locks_immediate
mysql_variable \'concurrent_insert\' concurrent_insert
mysql_variable \'low_priority_updates\' low_priority_updates
        if [ "$concurrent_insert" = 'ON' ]; then
                concurrent_insert=1
        elif [ "$concurrent_insert" = 'OFF' ]; then
                concurrent_insert=0
        fi


cechon "Current Lock Wait ratio = "
if [ $table_locks_waited -gt 0 ]; then
immediate_locks_miss_rate=$(($table_locks_immediate/$table_locks_waited))
cecho "1 : $immediate_locks_miss_rate" red 
else
immediate_locks_miss_rate=99999 # perfect
cecho "0 : $questions"
fi
if [ $immediate_locks_miss_rate -lt 5000 ] ; then
cecho "You may benefit from selective use of InnoDB."
if [ "$low_priority_updates" = 'OFF' ] ; then
cecho "If you have long running SELECT's against MyISAM tables and perform"
cecho "frequent updates consider setting 'low_priority_updates=1'"
fi
if [ "$mysql_version_num" -gt 050000 ] && [ "$mysql_version_num" -lt 050500 ]; then
if [ $concurrent_insert -le 1 ] ; then
cecho "If you have a high concurrency of inserts on Dynamic row-length tables"
cecho "consider setting 'concurrent_insert=2'."
fi
elif [ "$mysql_version_num" -gt 050500 ] ; then
if [ "$concurrent_insert" = 'AUTO' ] || [ "$concurrent_insert" = 'NEVER' ] ; then
cecho "If you have a high concurrency of inserts on Dynamic row-length tables"
cecho "consider setting 'concurrent_insert=ALWAYS'."
fi
fi
else
cecho "Your table locking seems to be fine" green
fi
}


check_table_scans () {


## -- Table Scans -- ##


cecho "TABLE SCANS" boldblue


mysql_status \'Com_select\' com_select
mysql_status \'Handler_read_rnd_next\' read_rnd_next
mysql_variable \'read_buffer_size\' read_buffer_size


if [ -z $read_buffer_size ] ; then
mysql_variable \'record_buffer\' read_buffer_size
fi


  human_readable $read_buffer_size read_buffer_sizeHR
cecho "Current read_buffer_size = $read_buffer_sizeHR $unit"

if [ $com_select -gt 0 ] ; then
full_table_scans=$(($read_rnd_next/$com_select))
cecho "Current table scan ratio = $full_table_scans : 1"
if [ $full_table_scans -ge 4000 ] && [ $read_buffer_size -le 2097152 ] ; then
cecho "You have a high ratio of sequential access requests to SELECTs" red
cechon "You may benefit from raising " red
if [ "$major_version" = '3.23' ] ; then 
cechon "record_buffer " red
else
cechon "read_buffer_size " red
fi
cecho "and/or improving your use of indexes." red
elif [ $read_buffer_size -gt 8388608 ] ; then 
cechon "read_buffer_size is over 8 MB " red 
cecho "there is probably no need for such a large read_buffer" red

else
cecho "read_buffer_size seems to be fine" green
fi
else
cecho "read_buffer_size seems to be fine" green
fi
}




check_innodb_status () {


## -- InnoDB -- ##


## See http://bugs.mysql.com/59393


if [ "$mysql_version_num" -lt 050603 ] ; then
mysql_variable \'have_innodb\' have_innodb
fi
if [ "$mysql_version_num" -lt 050500 ] && [ "$have_innodb" = "YES" ] ; then
innodb_enabled=1
fi
if [ "$mysql_version_num" -ge 050500 ] && [ "$mysql_version_num" -lt 050512 ] ; then 
mysql_variable \'ignore_builtin_innodb\' ignore_builtin_innodb
if [ "$ignore_builtin_innodb" = "ON" ] || [ $have_innodb = "NO" ] ; then
innodb_enabled=0
else
innodb_enabled=1
fi
elif [ "$major_version"  = '5.5' ] && [ "$mysql_version_num" -ge 050512 ] ; then
mysql_variable \'ignore_builtin_innodb\' ignore_builtin_innodb
if [ "$ignore_builtin_innodb" = "ON" ] ; then
innodb_enabled=0
else
innodb_enabled=1
fi
elif [ "$mysql_version_num" -ge 050600 ] && [ "$mysql_version_num" -lt 050603 ] ; then
mysql_variable \'ignore_builtin_innodb\' ignore_builtin_innodb
if [ "$ignore_builtin_innodb" = "ON" ] || [ $have_innodb = "NO" ] ; then
innodb_enabled=0
else
innodb_enabled=1
fi
elif [ "$major_version" = '5.6' ] && [ "$mysql_version_num" -ge 050603 ] ; then
mysql_variable \'ignore_builtin_innodb\' ignore_builtin_innodb
                if [ "$ignore_builtin_innodb" = "ON" ] ; then
                innodb_enabled=0
                else
                innodb_enabled=1
                fi
fi
if [ "$innodb_enabled" = 1 ] ; then
mysql_variable \'innodb_buffer_pool_size\' innodb_buffer_pool_size
mysql_variable \'innodb_additional_mem_pool_size\' innodb_additional_mem_pool_size
mysql_variable \'innodb_fast_shutdown\' innodb_fast_shutdown
mysql_variable \'innodb_flush_log_at_trx_commit\' innodb_flush_log_at_trx_commit
mysql_variable \'innodb_locks_unsafe_for_binlog\' innodb_locks_unsafe_for_binlog
mysql_variable \'innodb_log_buffer_size\' innodb_log_buffer_size
mysql_variable \'innodb_log_file_size\' innodb_log_file_size
mysql_variable \'innodb_log_files_in_group\' innodb_log_files_in_group
mysql_variable \'innodb_safe_binlog\' innodb_safe_binlog
mysql_variable \'innodb_thread_concurrency\' innodb_thread_concurrency


cecho "INNODB STATUS" boldblue
innodb_indexes=$($mysql -Bse "/*!50000 SELECT IFNULL(SUM(INDEX_LENGTH),0) from information_schema.TABLES where ENGINE='InnoDB' */")
innodb_data=$($mysql -Bse "/*!50000 SELECT IFNULL(SUM(DATA_LENGTH),0) from information_schema.TABLES where ENGINE='InnoDB' */")

if [ ! -z "$innodb_indexes" ] ; then


mysql_status \'Innodb_buffer_pool_pages_data\' innodb_buffer_pool_pages_data
mysql_status \'Innodb_buffer_pool_pages_misc\' innodb_buffer_pool_pages_misc
mysql_status \'Innodb_buffer_pool_pages_free\' innodb_buffer_pool_pages_free
mysql_status \'Innodb_buffer_pool_pages_total\' innodb_buffer_pool_pages_total


mysql_status \'Innodb_buffer_pool_read_ahead_seq\' innodb_buffer_pool_read_ahead_seq
mysql_status \'Innodb_buffer_pool_read_requests\' innodb_buffer_pool_read_requests


mysql_status \'Innodb_os_log_pending_fsyncs\' innodb_os_log_pending_fsyncs
mysql_status \'Innodb_os_log_pending_writes\' innodb_os_log_pending_writes
mysql_status \'Innodb_log_waits\' innodb_log_waits


mysql_status \'Innodb_row_lock_time\' innodb_row_lock_time
mysql_status \'Innodb_row_lock_waits\' innodb_row_lock_waits


human_readable $innodb_indexes innodb_indexesHR
cecho "Current InnoDB index space = $innodb_indexesHR $unit"
human_readable $innodb_data innodb_dataHR
cecho "Current InnoDB data space = $innodb_dataHR $unit"
percent_innodb_buffer_pool_free=$(($innodb_buffer_pool_pages_free*100/$innodb_buffer_pool_pages_total))
cecho "Current InnoDB buffer pool free = "$percent_innodb_buffer_pool_free" %"


else
cecho "Cannot parse InnoDB stats prior to 5.0.x" red
$mysql -s -e "SHOW /*!50000 ENGINE */ INNODB STATUS\G"
fi


human_readable $innodb_buffer_pool_size innodb_buffer_pool_sizeHR
cecho "Current innodb_buffer_pool_size = $innodb_buffer_pool_sizeHR $unit"
cecho "Depending on how much space your innodb indexes take up it may be safe"  
cecho "to increase this value to up to 2 / 3 of total system memory"
else
cecho "No InnoDB Support Enabled!" boldred
fi
}


total_memory_used () {


## -- Total Memory Usage -- ##
cecho "MEMORY USAGE" boldblue


mysql_variable \'read_buffer_size\' read_buffer_size
mysql_variable \'read_rnd_buffer_size\' read_rnd_buffer_size
mysql_variable \'sort_buffer_size\' sort_buffer_size
mysql_variable \'thread_stack\' thread_stack
mysql_variable \'max_connections\' max_connections
mysql_variable \'join_buffer_size\' join_buffer_size
mysql_variable \'tmp_table_size\' tmp_table_size
mysql_variable \'max_heap_table_size\' max_heap_table_size
mysql_variable \'log_bin\' log_bin
mysql_status \'Max_used_connections\' max_used_connections


if [ "$major_version" = "3.23" ] ; then
mysql_variable \'record_buffer\' read_buffer_size
mysql_variable \'record_rnd_buffer\' read_rnd_buffer_size
mysql_variable \'sort_buffer\' sort_buffer_size
fi


if [ "$log_bin" = "ON" ] ; then
mysql_variable \'binlog_cache_size\' binlog_cache_size
else
binlog_cache_size=0
fi


if [ $max_heap_table_size -le $tmp_table_size ] ; then
effective_tmp_table_size=$max_heap_table_size
else
effective_tmp_table_size=$tmp_table_size
fi




per_thread_buffers=$(echo "($read_buffer_size+$read_rnd_buffer_size+$sort_buffer_size+$thread_stack+$join_buffer_size+$binlog_cache_size)*$max_connections" | bc -l)
per_thread_max_buffers=$(echo "($read_buffer_size+$read_rnd_buffer_size+$sort_buffer_size+$thread_stack+$join_buffer_size+$binlog_cache_size)*$max_used_connections" | bc -l)


        mysql_variable \'innodb_buffer_pool_size\' innodb_buffer_pool_size
        if [ -z $innodb_buffer_pool_size ] ; then
        innodb_buffer_pool_size=0
        fi


        mysql_variable \'innodb_additional_mem_pool_size\' innodb_additional_mem_pool_size
        if [ -z $innodb_additional_mem_pool_size ] ; then
        innodb_additional_mem_pool_size=0
        fi


        mysql_variable \'innodb_log_buffer_size\' innodb_log_buffer_size
        if [ -z $innodb_log_buffer_size ] ; then
        innodb_log_buffer_size=0
        fi


        mysql_variable \'key_buffer_size\' key_buffer_size


        mysql_variable \'query_cache_size\' query_cache_size
        if [ -z $query_cache_size ] ; then
        query_cache_size=0
        fi


global_buffers=$(echo "$innodb_buffer_pool_size+$innodb_additional_mem_pool_size+$innodb_log_buffer_size+$key_buffer_size+$query_cache_size" | bc -l)




max_memory=$(echo "$global_buffers+$per_thread_max_buffers" | bc -l)
total_memory=$(echo "$global_buffers+$per_thread_buffers" | bc -l)


pct_of_sys_mem=$(echo "scale=0; $total_memory*100/$physical_memory" | bc -l)


if [ $pct_of_sys_mem -gt 90 ] ; then
txt_color=boldred
error=1
else
txt_color=
error=0
fi


human_readable $max_memory max_memoryHR
cecho "Max Memory Ever Allocated : $max_memoryHR $unit" $txt_color
human_readable $per_thread_buffers per_thread_buffersHR
cecho "Configured Max Per-thread Buffers : $per_thread_buffersHR $unit" $txt_color
human_readable $global_buffers global_buffersHR
cecho "Configured Max Global Buffers : $global_buffersHR $unit" $txt_color
human_readable $total_memory total_memoryHR
cecho "Configured Max Memory Limit : $total_memoryHR $unit" $txt_color
# human_readable $effective_tmp_table_size effective_tmp_table_sizeHR 
# cecho "Plus $effective_tmp_table_sizeHR $unit per temporary table created"
human_readable $physical_memory physical_memoryHR
cecho "Physical Memory : $physical_memoryHR $unit" $txt_color
if [ $error -eq 1 ] ; then
printf "\n"
cecho "Max memory limit exceeds 90% of physical memory" $txt_color
else
cecho "Max memory limit seem to be within acceptable norms" green
fi
unset txt_color
}


## Required Functions  ## 


login_validation () {
check_for_socket # determine the socket location -- 1st login
check_for_plesk_passwords # determine the login method -- 2nd login
check_mysql_login # determine if mysql is accepting login -- 3rd login
export major_version=$($mysql -Bse "SELECT SUBSTRING_INDEX(VERSION(), '.', +2)")
# export mysql_version_num=$($mysql -Bse "SELECT LEFT(REPLACE(SUBSTRING_INDEX(VERSION(), '-', +1), '.', ''),4)" )
export mysql_version_num=$($mysql -Bse "SELECT VERSION()" | 
awk -F \. '{ printf "%02d", $1; printf "%02d", $2; printf "%02d", $3 }')


}


shared_info () {
export major_version=$($mysql -Bse "SELECT SUBSTRING_INDEX(VERSION(), '.', +2)")
# export mysql_version_num=$($mysql -Bse "SELECT LEFT(REPLACE(SUBSTRING_INDEX(VERSION(), '-', +1), '.', ''),4)" )
export mysql_version_num=$($mysql -Bse "SELECT VERSION()" | 
awk -F \. '{ printf "%02d", $1; printf "%02d", $2; printf "%02d", $3 }')
mysql_status \'Questions\' questions
# socket_owner=$(find -L $socket -printf '%u\n')
socket_owner=$(ls -nH $socket | awk '{ print $3 }')
}



get_system_info () {


    export OS=$(uname)
    
    # Get information for various UNIXes
    if [ "$OS" = 'Darwin' ]; then
ps_socket=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }' | head -1)
found_socks=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }')
        export physical_memory=$(sysctl -n hw.memsize)
export duflags=''
    elif [ "$OS" = 'FreeBSD' ] || [ "$OS" = 'OpenBSD' ]; then
## On FreeBSD must be root to locate sockets.
ps_socket=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }' | head -1)
found_socks=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }')
        export physical_memory=$(sysctl -n hw.realmem)
export duflags=''
    elif [ "$OS" = 'Linux' ] ; then
## Includes SWAP
        ## export physical_memory=$(free -b | grep -v buffers |  awk '{ s += $2 } END { printf("%.0f\n", s ) }')
ps_socket=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }' | head -1)
found_socks=$(netstat -ln | awk '/mysql(.*)?\.sock/ { print $9 }')
export physical_memory=$(awk '/^MemTotal/ { printf("%.0f", $2*1024 ) }' < /proc/meminfo)
export duflags='-b'
    elif [ "$OS" = 'SunOS' ] ; then
ps_socket=$(netstat -an | awk '/mysql(.*)?.sock/ { print $5 }' | head -1)
found_socks=$(netstat -an | awk '/mysql(.*)?.sock/ { print $5 }') 
export physical_memory=$(prtconf | awk '/^Memory\ size:/ { print $3*1048576 }')
    fi
    if [ -z $(which bc) ] ; then
echo "Error: Command line calculator 'bc' not found!"
exit
    fi
}




## Optional Components Groups ##


banner_info () {
shared_info
print_banner ; echo
check_mysql_version ; echo
post_uptime_warning ; echo
}


misc () {
shared_info
check_slow_queries ; echo
check_binary_log ; echo
check_threads ; echo
check_used_connections ; echo
check_innodb_status ; echo
}


memory () {
shared_info
total_memory_used ; echo
check_key_buffer_size ; echo
check_query_cache ; echo
check_sort_operations ; echo
check_join_operations ; echo
}


file () {
shared_info
check_open_files ; echo
check_table_cache ; echo
check_tmp_tables ; echo
check_table_scans ; echo
check_table_locking ; echo
}


all () {
banner_info
misc
memory
file
}


prompt () {
prompted='true'
read -p "Username [anonymous] : " user
read -rp "Password [<none>] : " pass
cecho " "
read -p "Socket [ /var/lib/mysql/mysql.sock ] : " socket
if [ -z $socket ] ; then
export socket='/var/lib/mysql/mysql.sock'
fi


if [ -z $pass ] ; then
export mysql="mysql -S $socket -u$user"
export mysqladmin="mysqladmin -S $socket -u$user"
else
        export mysql="mysql -S $socket -u$user -p$pass"
        export mysqladmin="mysqladmin -S $socket -u$user -p$pass"
fi


check_for_socket
check_mysql_login


if [ $? = 1 ] ; then
exit 1
fi
read -p "Mode to test - banner, file, misc, mem, innodb, [all] : " REPLY
if [ -z $REPLY ] ; then
REPLY='all'
fi
case $REPLY in
       banner | BANNER | header | HEADER | head | HEAD)
banner_info 
;;
misc | MISC | miscelaneous )
misc
;;
        mem | memory |  MEM | MEMORY )
memory
;; 
file | FILE | disk | DISK )
file
;;
innodb | INNODB )
innodb
;;
all | ALL )
cecho " "
all
;;
* )
cecho "Invalid Mode!  Valid options are 'banner', 'misc', 'memory', 'file', 'innodb' or 'all'" boldred
exit 1
;;
esac 
}


## Address environmental differences ##
get_system_info
# echo $ps_socket


if [ -z "$1" ] ; then
login_validation
mode='ALL'
elif [ "$1" = "prompt" ] || [ "$1" = "PROMPT" ] ; then
mode=$1
elif [ "$1" != "prompt" ] || [ "$1" != "PROMPT" ] ; then
login_validation
mode=$1
fi


case $mode in 
all | ALL )
cecho " "
all
;;
mem | memory |  MEM | MEMORY )
cecho " "
memory
;;
file | FILE | disk | DISK )
cecho " "
file
;;
banner | BANNER | header | HEADER | head | HEAD )
banner_info
;;
misc | MISC | miscelaneous )
cecho " "
misc
;;
innodb | INNODB )
banner_info
check_innodb_status ; echo
;;
prompt | PROMPT )
prompt
;;
*)
cecho "usage: $0 [ all | banner | file | innodb | memory | misc | prompt ]" boldred
exit 1  
;;
esac