《Mysql入门MySQL压力测试方法 如何使用mysqlslap测试MySQL的压力?》要点：
本文介绍了Mysql入门MySQL压力测试方法 如何使用mysqlslap测试MySQL的压力?，希望对您有用。如果有疑问，可以联系我们。
其实mysql测试也没有这么复杂,除了一些常用的select\insert\update\deletc这些外,其实测试他的并发量才是最重要的.比如在连接数1K的时候,并发量能否满足当前哀求\服务器性能、内存CPU使用情况.说白了,测试mysql就是测试他的配置文件和并发量及服务器性能.MYSQL必读
一、工具
首选工具mysql自带的：mysqlslapMYSQL必读
Cauto-generate-sql, -a
自动生成测试表和数据MYSQL必读
Cauto-generate-sql-load-type=type
测试语句的类型.取值包括：read,key,write,update和mixed(默认).MYSQL必读
Cnumber-char-cols=N, -x N
自动生成的测试表中包含多少个字符类型的列,默认1MYSQL必读
Cnumber-int-cols=N, -y N
自动生成的测试表中包含多少个数字类型的列,默认1MYSQL必读
Cnumber-of-queries=N
总的测试查询次数(并发客户数×每客户查询次数)MYSQL必读
Cquery=name,-q
使用自定义脚本执行测试,例如可以调用自定义的一个存储过程或者sql语句来执行测试.MYSQL必读
Ccreate-schema
测试的schema,MySQL中schema也就是databaseMYSQL必读
Ccommint=N
多少条DML后提交一次MYSQL必读
Ccompress, -C
如果服务器和客户端支持都压缩,则压缩信息传递MYSQL必读
Cconcurrency=N, -c N
并发量,也就是模拟多少个客户端同时执行select.可指定多个值,以逗号或者Cdelimiter参数指定的值做为分隔符MYSQL必读
Cengine=engine_name, -e engine_name
创建测试表所使用的存储引擎,可指定多个MYSQL必读
Citerations=N, -i N
测试执行的迭代次数MYSQL必读
Cdetach=N
执行N条语句后断开重连MYSQL必读
Cdebug-info, -T
打印内存和CPU的信息MYSQL必读
Conly-print
只打印测试语句而不实际执行MYSQL必读
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测试的过程需要生成测试表,插入测试数据,这个mysqlslap可以自动生成,默认生成一个mysqlslap的schema,如果已经存在则先删除,这里要注意了,不要用Ccreate-schema指定已经存在的库,否则后果可能很严重.可以用Conly-print来打印实际的测试过程：MYSQL必读
# mysqlslap -a Conly-printMYSQL必读
DROP SCHEMA IF EXISTS `mysqlslap`;
CREATE SCHEMA `mysqlslap`;
use mysqlslap;
CREATE TABLE `t1` (intcol1 INT(32) ,charcol1 VARCHAR(128));
INSERT INTO t1 VALUES (1804289383,'mxvtvmC9127qJNm06sGB8R92q2j7vTiiITRD9rdxBL');
…
SELECT intcol1,charcol1 FROM t1;
INSERT INTO t1 VALUES (364531492,'qMa5SuKo4M5OM7ldvisSc6WK9rsNTGFxkDJ4EAwW');
DROP SCHEMA IF EXISTS `mysqlslap`;
可以看到最后由删除一开始创建的schema的动作,整个测试完成后不会在数据库中留下痕迹.假如我们执行一次测试,分别50和100个并发,执行1000次总查询,那么：MYSQL必读
# mysqlslap -uroot -p123456 -a Cconcurrency=50,100 Cnumber-of-queries 1000 Cdebug-infoMYSQL必读
Benchmark
Average number of seconds to run all queries: 0.375 seconds
Minimum number of seconds to run all queries: 0.375 seconds
Maximum number of seconds to run all queries: 0.375 seconds
Number of clients running queries: 50
Average number of queries per client: 20MYSQL必读
Benchmark
Average number of seconds to run all queries: 0.453 seconds
Minimum number of seconds to run all queries: 0.453 seconds
Maximum number of seconds to run all queries: 0.453 seconds
Number of clients running queries: 100
Average number of queries per client: 10MYSQL必读
User time 0.29, System time 0.11
Maximum resident set size 0, Integral resident set size 0
Non-physical pagefaults 4032, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 7319, Involuntary context switches 681MYSQL必读
以上结果可以看出,50和100个并发分别得到一次测试结果(Benchmark),并发数越多,执行完所有查询的时间越长.为了准确起见,可以多迭代测试几次:MYSQL必读
# mysqlslap -a Cconcurrency=50,100 Cnumber-of-queries 1000 Citerations=5 Cdebug-infoMYSQL必读
Benchmark
Average number of seconds to run all queries: 0.380 seconds
Minimum number of seconds to run all queries: 0.377 seconds
Maximum number of seconds to run all queries: 0.385 seconds
Number of clients running queries: 50
Average number of queries per client: 20MYSQL必读
Benchmark
Average number of seconds to run all queries: 0.447 seconds
Minimum number of seconds to run all queries: 0.444 seconds
Maximum number of seconds to run all queries: 0.451 seconds
Number of clients running queries: 100
Average number of queries per client: 10MYSQL必读
User time 1.44, System time 0.67
Maximum resident set size 0, Integral resident set size 0
Non-physical pagefaults 17922, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 36796, Involuntary context switches 4093MYSQL必读
测试同时不同的存储引擎的性能进行对比：
# mysqlslap -uroot -p123456 -a -concurrency=50,100 Cnumber-of-queries 1000 Citerations=5 Cengine=myisam,innodb Cdebug-info
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.200 seconds
Minimum number of seconds to run all queries: 0.188 seconds
Maximum number of seconds to run all queries: 0.210 seconds
Number of clients running queries: 50
Average number of queries per client: 20MYSQL必读
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.238 seconds
Minimum number of seconds to run all queries: 0.228 seconds
Maximum number of seconds to run all queries: 0.251 seconds
Number of clients running queries: 100
Average number of queries per client: 10MYSQL必读
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.375 seconds
Minimum number of seconds to run all queries: 0.370 seconds
Maximum number of seconds to run all queries: 0.379 seconds
Number of clients running queries: 50
Average number of queries per client: 20MYSQL必读
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.443 seconds
Minimum number of seconds to run all queries: 0.440 seconds
Maximum number of seconds to run all queries: 0.447 seconds
Number of clients running queries: 100
Average number of queries per client: 10MYSQL必读
User time 2.83, System time 1.66
Maximum resident set size 0, Integral resident set size 0
Non-physical pagefaults 34692, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 87306, Involuntary context switches 10326MYSQL必读
# mysqladmin -uroot -p123456 -i 10 extended status 每10秒刷新一次MYSQL必读
Aborted_connects 尝试已经失败的MySQL服务器的连接的次数.
Connections 试图连接MySQL服务器的次数.
Created_tmp_tables 当执行语句时,已经被创造了的隐含临时表的数量.
Delayed_insert_threads 正在使用的延迟插入处理器线程的数量.
Delayed_writes 用INSERT DELAYED写入的行数.
Delayed_errors 用INSERT DELAYED写入的发生某些错误(可能重复键值)的行数.
Flush_commands 执行FLUSH命令的次数.
Handler_delete 哀求从一张表中删除行的次数.
Handler_read_first 哀求读入表中第一行的次数.
Handler_read_key 哀求数字基于键读行.
Handler_read_next 哀求读入基于一个键的一行的次数.
Handler_read_rnd 哀求读入基于一个固定位置的一行的次数.
Handler_update 哀求更新表中一行的次数.
Handler_write 哀求向表中插入一行的次数.
Key_blocks_used 用于关键字缓存的块的数量.
Key_read_requests 哀求从缓存读入一个键值的次数.
Key_reads 从磁盘物理读入一个键值的次数.
Key_write_requests 哀求将一个关键字块写入缓存次数.
Key_writes 将一个键值块物理写入磁盘的次数.
Max_used_connections 同时使用的连接的最大数目.
Not_flushed_key_blocks 在键缓存中已经改变但是还没被清空到磁盘上的键块.
Not_flushed_delayed_rows 在INSERT DELAY队列中等待写入的行的数量.
Open_tables 打开表的数量.
Open_files 打开文件的数量.
Open_streams 打开流的数量(主要用于日志记载)
Opened_tables 已经打开的表的数量.
Questions 发往服务器的查询的数量.
Slow_queries 要花超过long_query_time时间的查询数量.
Threads_connected 当前打开的连接的数量.
Threads_running 不在睡眠的线程数量.
Uptime 服务器工作了多少秒.MYSQL必读
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