数据库|mysql教程
数据库,多线程
数据库-mysql教程
最近用sysbench进行了较多的性能测试，也总结一下它的特点和用法和需要注意的事项。sysbench是一个多线程性能测试工具，可以进行CPU/内存/IO/数据库等性能测试。不过我绝大多数的时候都是用它来对数据库(MySQL)进行oltp测试。它能测哪些东西，怎么测让我从它的命令帮助来回答。
~/zbs$ sysbench –help
Missing required command argument.
Usage:
sysbench [general-options]… –test= [test-options]… command
上面就大概的用法，–test=指定我们需要测什么类型，那么–test有哪几种类型呢？fileio/cpu/memory/threads/mutex，不好意思前面这几个我都没测过，我主要是用它来测数据库的性能，但为什么没有数据库这个选项呢，这是我是用了最新的版本0.5，它与0.4的版本最大区别在于支持多表测试，执行实时打印统计信息，支持自定义lua脚本来设置测试行为。
Compiled-in tests:
fileio – File I/O test
cpu – CPU performance test
memory – Memory functions speed test
threads – Threads subsystem performance test
mutex – Mutex performance test
如果你用sysbench0.4大概会看到如下，请注意oltp这个选项就是测数据库用的。
Compiled-in tests:
fileio – File I/O test
cpu – CPU performance test
memory – Memory functions speed test
threads – Threads subsystem performance test
mutex – Mutex performance test
oltp – OLTP test
看完了测试模式之后，那么它有一些什么主要的其他控制参数呢？首先说这个每个测试模式自己特有的参数怎么擦看 sysbench –test= help，比如我这里（请注意，由于sysbench0.5的–test选项对数据库的测试不再使用oltp这个选项而是通过指定lua脚本，因此利用前面这个命令查看不到下面的结果，所以如果要查看还是通过0.4的吧，如果谁找到了方式在0.5版本里查看oltp的参数也请告诉一下。另外虽然0.5与0.4版本不同但是参数还是基本上保持兼容的）：
~$ sysbench –test=oltp help
sysbench 0.4.12: multi-threaded system evaluation benchmark
oltp options:
–oltp-test-mode=STRING test type to use {simple,complex,nontrx,sp} [complex]
–oltp-reconnect-mode=STRING reconnect mode {session,transaction,query,random} [session]
–oltp-sp-name=STRING name of store procedure to call in SP test mode []
–oltp-read-only=[on|off] generate only ‘read’ queries (do not modify database) [off]
–oltp-skip-trx=[on|off] skip BEGIN/COMMIT statements [off]
–oltp-range-size=N range size for range queries [100]
–oltp-point-selects=N number of point selects [10]
–oltp-simple-ranges=N number of simple ranges [1]
–oltp-sum-ranges=N number of sum ranges [1]
–oltp-order-ranges=N number of ordered ranges [1]
–oltp-distinct-ranges=N number of distinct ranges [1]
–oltp-index-updates=N number of index update [1]
–oltp-non-index-updates=N number of non-index updates [1]
–oltp-nontrx-mode=STRING mode for non-transactional test {select, update_key, update_nokey, insert, delete} [select]
–oltp-auto-inc=[on|off] whether AUTO_INCREMENT (or equivalent) should be used on id column [on]
–oltp-connect-delay=N time in microseconds to sleep after connection to database [10000]
–oltp-user-delay-min=N minimum time in microseconds to sleep after each request [0]
–oltp-user-delay-max=N maximum time in microseconds to sleep after each request [0]
–oltp-table-name=STRING name of test table [sbtest]
–oltp-table-size=N number of records in test table [10000]
–oltp-dist-type=STRING random numbers distribution {uniform,gaussian,special} [special]
–oltp-dist-iter=N number of iterations used for numbers generation [12]
–oltp-dist-pct=N percentage of values to be treated as ‘special’ (for special distribution) [1]
–oltp-dist-res=N percentage of ‘special’ values to use (for special distribution) [75]
General database options:
–db-driver=STRING specifies database driver to use (‘help’ to get list of available drivers)
–db-ps-mode=STRING prepared statements usage mode {auto, disable} [auto]
Compiled-in database drivers:
mysql – MySQL driver
mysql options:
–mysql-host=[LIST,…] MySQL server host [localhost]
–mysql-port=N MySQL server port [3306]
–mysql-socket=STRING MySQL socket
–mysql-user=STRING MySQL user [sbtest]
–mysql-password=STRING MySQL password []
–mysql-db=STRING MySQL database name [sbtest]
–mysql-table-engine=STRING storage engine to use for the test table {myisam,innodb,bdb,heap,ndbcluster,federated} [innodb]
–mysql-engine-trx=STRING whether storage engine used is transactional or not {yes,no,auto} [auto]
–mysql-ssl=[on|off] use SSL connections, if available in the client library [off]
–myisam-max-rows=N max-rows parameter for MyISAM tables [1000000]
–mysql-create-options=STRING additional options passed to CREATE TABLE []
上面有这么多参数，相信都能基本看懂吧，我等下举例的时候会讲到里面的参数代表什么含义。然后知道怎么查看具体某个测试模式的用法之后再来看general-options，通用参数，下面看看0.5的参数（相对0.4的增加了不少，有些参数的名称也变了，怎么辨别—对某个参数解释一模一样）：
General options:
–num-threads=N number of threads to use [1]
–max-requests=N limit for total number of requests [10000]
–max-time=N limit for total execution time in seconds [0]
–forced-shutdown=STRING amount of time to wait after –max-time before forcing shutdown [off]
–thread-stack-size=SIZE size of stack per thread [64K]
–tx-rate=N target transaction rate (tps) [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. []
–test=STRING test to run
–debug=[on|off] print more debugging info [off]
–validate=[on|off] perform validation checks where possible [off]
–help=[on|off] print help and exit
–version=[on|off] print version and exit [off]
–rand-init=[on|off] initialize random number generator [off]
–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, ignored when 0 [0]
–rand-pareto-h=N parameter h for pareto distibution [0.2]
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