mysql读写性能测试
http://my.oschina.net/costaxu/blog/108568
近来工作中用mysql较多，但其实自己对mysql性能并不十分了解。前阵子正好读到一篇写用mysqlslap压测mysql性能的文章，于是自己也尝试了一下mysqlslap并且得到一些数据和结论。把压测到的数据与大家分享，如有谬误之处请指正。若需要详细了解本文使用的压力测试工具mysqlslap请移步下面的链接：
用mysqlslap进行mysql压力测试
mysqlslap官方文档
概述和测试环境
压测的目的是为了尽量模拟真实情况。测试的表都是由10个int型字段和10个字符串型字段组成。每个测试项目都测试了myisam和innodb两个引擎。测试的方法都是用两个线程并发，一共跑10000个请求。
压测的机器用的是自己的笔记本。CPU是Intel(R) Core(TM)2 Duo CPU P8400， 4G内存， SATA硬盘。
mysql服务器端和压测的客户端跑在同一台机器上。mysql的版本是5.5.
用到的mysqlslap参数解释如下：
--concurrency=2 两个线程
--iterations=1 执行一次
--number-int-cols=10 10个int型字段
--number-char-cols=10 10个字符串字段
-a 等同于--auto-generate-sql
--auto-generate-sql-add-autoincrement 创建auto increment的主键
--auto-generate-sql-secondary-indexes=2 创建2列索引
--auto-generate-sql-guid-primary 创建guid作为主键
--number-of-queries=10000 所有并发线程的请求次数和
--auto-generate-sql-load-type=write/key/read/update/mixed 测试的query类型
--engine=myisam,innodb 存储引擎
写性能测试
写性能测试1，不开binlog, guid做主键, 无索引
测试命令：
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mysqlslap --concurrency=2\
--iterations=1\
--number-
int
-cols=10\
--number-
char
-cols=10\
-a\
--
auto
-generate-sql-guid-primary\
--number-of-queries=10000\
--
auto
-generate-sql-load-type=write\
--engine=myisam,innodb\
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 6.110 seconds
Minimum number of seconds to run all queries: 6.110 seconds
Maximum number of seconds to run all queries: 6.110 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 10.291 seconds
Minimum number of seconds to run all queries: 10.291 seconds
Maximum number of seconds to run all queries: 10.291 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
|
用innodb每秒处理971次。
真实环境中一般会用binlog做数据备份与同步，所以性能会有所下降，有binlog的情况请继续看后面的实验。
写性能测试2， 开binlog, guid做主键， 无索引
测试命令与“写性能测试1”相同，
结果如下：
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 14.809 seconds
Minimum number of seconds to run all queries: 14.809 seconds
Maximum number of seconds to run all queries: 14.809 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 26.721 seconds
Minimum number of seconds to run all queries: 26.721 seconds
Maximum number of seconds to run all queries: 26.721 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
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innodb每秒处理374次
写性能测试3， 开binlog, guid做主键， 有索引
现实情况中，有索引的情况较多。采用 --auto-generate-sql-secondary-indexes=2 创建两列索引。
命令如下:
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mysqlslap --concurrency=2\
--iterations=1\
--number-
int
-cols=10\
--number-
char
-cols=10\
-a\
--
auto
-generate-sql-guid-primary\
--
auto
-generate-sql-secondary-indexes=2\
--number-of-queries=10000\
--
auto
-generate-sql-load-type=write\
--engine=myisam,innodb\
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结果如下：
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 16.693 seconds
Minimum number of seconds to run all queries: 16.693 seconds
Maximum number of seconds to run all queries: 16.693 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 30.418 seconds
Minimum number of seconds to run all queries: 30.418 seconds
Maximum number of seconds to run all queries: 30.418 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
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innodb每秒处理329次。
写性能测试4，开binglog，auto increment主键，有索引
命令如下：
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mysqlslap --concurrency=2\
--iterations=1\
--number-
int
-cols=10\
--number-
char
-cols=10\
-a\
--
auto
-generate-sql-add-autoincrement\
--
auto
-generate-sql-secondary-indexes=2\
--number-of-queries=10000\
--
auto
-generate-sql-load-type=write\
--engine=myisam,innodb\
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 16.785 seconds
Minimum number of seconds to run all queries: 16.785 seconds
Maximum number of seconds to run all queries: 16.785 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 28.809 seconds
Minimum number of seconds to run all queries: 28.809 seconds
Maximum number of seconds to run all queries: 28.809 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
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innodb每秒处理347次。
读性能测试
在真实的情况中，我们最主要的读操作其实就是用主键去查找表中的一行。 我主要是对这种行为进行测试。所以采用的load-type = key ,而不是read。 read是对全表进行读取，可是实际上这种情况很少出现。
读性能测试1，guid主键
命令如下：
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mysqlslap --concurrency=2\
--iterations=1\
--number-
int
-cols=10\
--number-
char
-cols=10\
-a\
--
auto
-generate-sql-guid-primary\
--
auto
-generate-sql-unique-query-number=10000\
--
auto
-generate-sql-load-type=key\
--number-of-queries=10000\
--engine=myisam,innodb\
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 4.215 seconds
Minimum number of seconds to run all queries: 4.215 seconds
Maximum number of seconds to run all queries: 4.215 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 3.917 seconds
Minimum number of seconds to run all queries: 3.917 seconds
Maximum number of seconds to run all queries: 3.917 seconds
Number of clients running queries: 2
Average number of queries per client: 5000
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innodb每秒处理2553次
读性能测试2，auto increment主键
命令如下
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mysqlslap --concurrency=1\
--iterations=1\
--number-
int
-cols=10\
--number-
char
-cols=10\
-a\
--
auto
-generate-sql-add-autoincrement\
--
auto
-generate-sql-unique-query-number=10000\
--
auto
-generate-sql-load-type=key\
--number-of-queries=10000\
--engine=myisam,innodb\
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Benchmark
Running
for
engine myisam
Average number of seconds to run all queries: 4.555 seconds
Minimum number of seconds to run all queries: 4.555 seconds
Maximum number of seconds to run all queries: 4.555 seconds
Number of clients running queries: 1
Average number of queries per client: 10000
Benchmark
Running
for
engine innodb
Average number of seconds to run all queries: 4.402 seconds
Minimum number of seconds to run all queries: 4.402 seconds
Maximum number of seconds to run all queries: 4.402 seconds
Number of clients running queries: 1
Average number of queries per client: 10000
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innodb每秒处理2273次。
实验结果
| 项目 | myisam每秒吞吐量 | innodb每秒吞吐量 |
| 写性能测试1，不开binlog, guid主键, 无索引 |
1639 | 971 |
| 写性能测试2，开binlog,guid主键，无索引 |
675 | 374 |
| 写性能测试3， 开binlog, guid做主键， 有索引 |
599 | 329 |
| 写性能测试4，开binglog，auto increment主键，有索引 |
595 | 347 |
| 读性能测试1，guid主键 |
2372 | 2553 |
| 读性能测试2，auto increment主键 |
2195 | 2273 |
结论
1 在开启了binlog后， mysql写性能下降60%
2 myisam与innodb相比，写的速度更快（快40%）, 读的速度差不多。