sysbench进行压力测试

• sysbenchd 安装

sysbench在各平台的安装可以在github上找到，目前是1.0.17版本。
目前我通过Mac的homebrew进行安装的版本为1.0.16。通过homebrew安装发现了一些使用上的问题，没有通过压缩包进行unzip操作后的config文件进行一些配置；在对MySQL进行OLTP测试时，网上大多教程上的OLTP指令调用无法正确执行，可能是网上大多版本低于1.0（多为0.5）的缘故，也可能是brew的文件结构与压缩包的结构不同，已通过使用绝对地址的方式成功进行了对MySQL进行OLTP。

• sysbench的常见用法

sysbench可以对机器的硬件进行测试，比如CPU、内存、文件读写、线程处理、锁等，也可以对MySQL数据库进行测试，比自带的MySQLslap更加强大。

--threads=N                number of threads to use [default 0] # --num-threads has been deprecated 
--evens=N                  limit for total number of events[default 0]
--time=N                   limit for total execution time in seconds[default 10] # --max-time has been deprecated
--forced-shutdown=STRING   number of seconds to wait after --time limit before forcing shutdown, or 'off' to disable[default off]
--thread-stack-size=SIZE   size of stack per thread [64K]
--rate=N                   average transactions rate. 0 for unlimited rate [0]
--report-interval=N        periodically report intermediate statistics with a specified interval in seconds. 0 disables intermediate reports [0]
--report-checkpoints=[LIST,...] dump full statistics and reset all counters at specified points in time. The argument is a list of comma-separated values representing the amount of time in seconds elapsed from start of test when report checkpoint(s) must be performed. Report checkpoints are off by default. []
--debug[=on|off]            print more debugging info [off]
--validate[=on|off]         perform validation checks where possible [off]
--help[=on|off]             print help and exit [off]
--version[=on|off]          print version and exit [off]
--config-file=FILENAME      File containing command line options

Pseudo-Random Numbers Generator options:
  --rand-type=STRING random numbers distribution {uniform,gaussian,special,pareto} [special]
  --rand-spec-iter=N number of iterations used for numbers generation [12]
  --rand-spec-pct=N  percentage of values to be treated as 'special' (for special distribution) [1]
  --rand-spec-res=N  percentage of 'special' values to use (for special distribution) [75]
  --rand-seed=N      seed for random number generator. When 0, the current time is used as a RNG seed. [0]
  --rand-pareto-h=N  parameter h for pareto distribution [0.2]

Log options:
  --verbosity=N verbosity level {5 - debug, 0 - only critical messages} [3]

  --percentile=N       percentile to calculate in latency statistics (1-100). Use the special value of 0 to disable percentile calculations [95]
  --histogram[=on|off] print latency histogram in report [off]

General database options:

  --db-driver=STRING  specifies database driver to use ('help' to get list of available drivers) [mysql]
  --db-ps-mode=STRING prepared statements usage mode {auto, disable} [auto]
  --db-debug[=on|off] print database-specific debug information [off]

ompiled-in database drivers:
  mysql - MySQL driver

mysql options:
  --mysql-host=[LIST,...]          MySQL server host [localhost]
  --mysql-port=[LIST,...]          MySQL server port [3306]
  --mysql-socket=[LIST,...]        MySQL socket
  --mysql-user=STRING              MySQL user [sbtest]
  --mysql-password=STRING          MySQL password []
  --mysql-db=STRING                MySQL database name [sbtest]
  --mysql-ssl[=on|off]             use SSL connections, if available in the client library [off]
  --mysql-ssl-cipher=STRING        use specific cipher for SSL connections []
  --mysql-compression[=on|off]     use compression, if available in the client library [off]
  --mysql-debug[=on|off]           trace all client library calls [off]
  --mysql-ignore-errors=[LIST,...] list of errors to ignore, or "all" [1213,1020,1205]
  --mysql-dry-run[=on|off]         Dry run, pretend that all MySQL client API calls are successful without executing them [off]

• sysbench使用中发现的问题

1. 前文提到的对MySQL进行OLTP测试时，无法像对CPU、内存等进行sysbench CPU|memory操作，而是需要在brew的文件中找到有关于OLTP的lua文件，进行sysbench lua文件地址才能进行OLTP。
2. 在对测试项目进行选择是，--test参数已经不再使用了，会报出no such built-in test, file or module的错误。
3. 在对文件IO进行测试时，最好将测试大小设定为超过内存大小。以保证测试的准确性，避免文件全部进入缓存中。

• 几个例子

对文件随机读写进行测试

首先准备好测试数据（例子为10Gb），这是sysbench的必备操作之一

prepare data

然后执行run操作，进行测试

run commond

得到测试结果

在run操作后，会得到一系列的测试数据。
最后执行cleanup操作，将测试数据清除掉。

对MySQL进行OLTP

首先找到OLTP的lua文件，然后准备数据（例子中为10个表，每张表100万行数据）

准备数据

然后进行run操作，最终得到测试数据

得到测试数据

得到测试数据