快速优化linux Mysql

借助tuning-primer.sh 快速检测你的mysql是否已经优化的极点

获取:　
wget http://www.day32.com/MySQL/tuning-primer.sh
wget http://tools.assembla.com/svn/mysqltuner/mysqltuner.pl

chmod+xtuning-primer.sh
./tuning-primer.sh

运行结果如下：

[shell]# ./tuning-primer.sh

Using login values from ~/.my.cnf

- INITIAL LOGIN ATTEMPT FAILED -

Testing for stored webmin passwords: None Found

Could not auto detect login info!

Found Sockets:
/var/lib/mysql/mysql.sock

Using: /var/lib/mysql/mysql.sock
Would you like to provide a different socket?: [y/N] n
Do you have your login handy ? [y/N] : y
User: root
Password: 123

Would you like me to create a ~/.my.cnf file for you? [y/N] : n

-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -

MySQL Version 5.1.7-beta-log i686

./tuning-primer.sh: line 407: bc: command not found
./tuning-primer.sh: line 408: bc: command not found
./tuning-primer.sh: line 409: bc: command not found
./tuning-primer.sh: line 410: bc: command not found
./tuning-primer.sh: line 411: bc: command not found
./tuning-primer.sh: line 412: bc: command not found
Uptime = days hrs min sec
Avg. qps = 0
Total Questions = 10
Threads Connected = 1

Warning: Server has not been running for at least 48hrs.
It may not be safe to use these recommendations

To find out more information on how each of these
runtime variables effects performance visit:
http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html
Visit http://www.mysql.com/products/enterprise/advisors.html
for info about MySQL's Enterprise Monitoring and Advisory Service

SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 10 sec.
You have 0 out of 24 that take longer than 10 sec. to complete
./tuning-primer.sh: line 313: bc: command not found
./tuning-primer.sh: line 520: [: -gt: unary operator expected
Your long_query_time seems to be fine

BINARY UPDATE LOG
The binary update log is enabled

WORKER THREADS
Current thread_cache_size = 16384
Current threads_cached = 0
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 20
Current threads_connected = 1
Historic max_used_connections = 1
The number of used connections is 5% of the configured maximum.
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

MEMORY USAGE
./tuning-primer.sh: line 1226: bc: command not found
./tuning-primer.sh: line 1227: bc: command not found
./tuning-primer.sh: line 1251: bc: command not found
./tuning-primer.sh: line 1254: bc: command not found
./tuning-primer.sh: line 1255: bc: command not found
./tuning-primer.sh: line 1257: bc: command not found
./tuning-primer.sh: line 1259: [: -gt: unary operator expected
./tuning-primer.sh: line 369: [: max_memoryHR: integer expression expected
./tuning-primer.sh: line 375: [: max_memoryHR: integer expression expected
./tuning-primer.sh: line 381: [: max_memoryHR: integer expression expected
./tuning-primer.sh: line 388: export: `=max_memoryHR': not a valid identifier
Max Memory Ever Allocated : bytes
./tuning-primer.sh: line 369: [: per_thread_buffersHR: integer expression expected
./tuning-primer.sh: line 375: [: per_thread_buffersHR: integer expression expected
./tuning-primer.sh: line 381: [: per_thread_buffersHR: integer expression expected
./tuning-primer.sh: line 388: export: `=per_thread_buffersHR': not a valid identifier
Configured Max Per-thread Buffers : bytes
./tuning-primer.sh: line 369: [: global_buffersHR: integer expression expected
./tuning-primer.sh: line 375: [: global_buffersHR: integer expression expected
./tuning-primer.sh: line 381: [: global_buffersHR: integer expression expected
./tuning-primer.sh: line 388: export: `=global_buffersHR': not a valid identifier
Configured Max Global Buffers : bytes
./tuning-primer.sh: line 369: [: total_memoryHR: integer expression expected
./tuning-primer.sh: line 375: [: total_memoryHR: integer expression expected
./tuning-primer.sh: line 381: [: total_memoryHR: integer expression expected
./tuning-primer.sh: line 388: export: `=total_memoryHR': not a valid identifier
Configured Max Memory Limit : bytes
./tuning-primer.sh: line 350: bc: command not found
Physical Memory : M
Max memory limit seem to be within acceptable norms

KEY BUFFER
No key reads?!
Seriously look into using some indexes
./tuning-primer.sh: line 663: bc: command not found
./tuning-primer.sh: line 664: bc: command not found
./tuning-primer.sh: line 350: bc: command not found
Current MyISAM index space = M
./tuning-primer.sh: line 350: bc: command not found
Current key_buffer_size = M
Key cache miss rate is 1 : 0
Key buffer free ratio = %
./tuning-primer.sh: line 706: [: -le: unary operator expected
./tuning-primer.sh: line 710: [: -le: unary operator expected
Your key_buffer_size seems to be fine

QUERY CACHE
./tuning-primer.sh: line 741: bc: command not found
./tuning-primer.sh: line 742: bc: command not found
Query cache is enabled
./tuning-primer.sh: line 350: bc: command not found
Current query_cache_size = M
./tuning-primer.sh: line 350: bc: command not found
Current query_cache_used = K
./tuning-primer.sh: line 350: bc: command not found
Current query_cache_limit = M
Current Query cache Memory fill ratio = %
./tuning-primer.sh: line 350: bc: command not found
Current query_cache_min_res_unit = K
./tuning-primer.sh: line 764: [: -le: unary operator expected
MySQL won't cache query results that are larger than query_cache_limit in size

SORT OPERATIONS
./tuning-primer.sh: line 350: bc: command not found
Current sort_buffer_size = M
./tuning-primer.sh: line 350: bc: command not found
Current read_rnd_buffer_size = M
No sort operations have been performed
Sort buffer seems to be fine

JOINS
./tuning-primer.sh: line 350: bc: command not found
Current join_buffer_size = K
You have had 0 queries where a join could not use an index properly
Your joins seem to be using indexes properly

OPEN FILES LIMIT
Current open_files_limit = 65535 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine

TABLE CACHE
Current table_open_cache = 524288 tables
Current table_definition_cache = 524288 tables
You have a total of 238 tables
You have 283 open tables.
The table_cache value seems to be fine

TEMP TABLES
./tuning-primer.sh: line 350: bc: command not found
Current max_heap_table_size = M
./tuning-primer.sh: line 350: bc: command not found
Current tmp_table_size = M
Of 151 temp tables, 12% were created on disk
Effective in-memory tmp_table_size is limited to max_heap_table_size.
Created disk tmp tables ratio seems fine

TABLE SCANS
./tuning-primer.sh: line 350: bc: command not found
Current read_buffer_size = K
Current table scan ratio = 58 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 0 : 148
Your table locking seems to be fine

这是根据我的测试结果配置的my.cnf

# Example MySQL config file for medium systems.
#
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)
#
# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is /var/lib/mysql) or
# ~/.my.cnf to set user-specific options.
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.

# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /var/lib/mysql/mysql.sock

default-character-set=gbk

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-locking
key_buffer = 16M
max_allowed_packet = 1M
table_cache = 16M
table_definition_cache =8M
expire_logs_days=1
sort_buffer_size = 1M
net_buffer_length = 8K
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
query_cache_size=10M
query_cache_limit = 64M
thread_cache_size=8M
thread_concurrency=8
default-character-set=gbk
max_connections=20
sync_binlog=8
open_files_limit =30
max_heap_table_size =4M


# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking

# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin

# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1

# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables' values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password = <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port = <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin

# Point the following paths to different dedicated disks
#tmpdir = /tmp/
#log-update = /path-to-dedicated-directory/hostname

# Uncomment the following if you are using BDB tables
#bdb_cache_size = 16M
#bdb_max_lock = 10000

# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /var/lib/mysql/
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = /var/lib/mysql/
#innodb_log_arch_dir = /var/lib/mysql/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M
#innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout