前言：最近新到一批机器，需要对机器进行压测，主要压测范围包括CPU测试、磁盘IO测试、线程测试、OLTP测试等，那么sysbench就可以满足我们的压测需求。下面我们简单来看下sysbench的安装使用以及压测结果的解读。
一、sysbench安装
sysbench安装其实非常简单，可以参考下git，其实MySQL官网也可以下到，不过版本比较老了，最新的版本是sysbench1.1.0，这里我们讲下源码编译安装。
上传sysbench到服务器、解压、安装：
[root@localhost tmp]# unzip sysbench-master.zip
[root@localhost tmp]# cd sysbench-master
[root@localhost sysbench-master]# ./autogen.sh
[root@localhost sysbench-master]# ./configure
[root@localhost sysbench-master]# make -j
[root@localhost sysbench-master]# make install
其实可以查看下README.md,上面也写了如何安装
## Build and Install
shell
./autogen.sh
# Add --with-pgsql to build with PostgreSQL support
./configure
make -j
make install
二、压测过程及压测结果解读
1.cpu测试
[root@localhost storage]# sysbench --test=cpu --cpu-max-prime=2000000 run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 1
Initializing random number generator from current time
Prime numbers limit: 2000000
Initializing worker threads...
Threads started!
CPU speed:
events per second: 0.63
Throughput:
events/s (eps): 0.6334
time elapsed: 11.0520s
total number of events: 7
Latency (ms):
min: 1571.86
avg: 1578.84
max: 1620.53
95th percentile: 1618.78
sum: 11051.91
Threads fairness:
events (avg/stddev): 7.0000/0.00
execution time (avg/stddev): 11.0519/0.00
cpu测试主要是进行素数的加法运算，上面我们的例子中，指定了最大的质数发生器数量为 2000000，可以看出服务器此次测试 执行时间 大约为11.05秒
2.磁盘IO测试
[root@localhost storage]# sysbench --test=fileio --num-threads=16 --file-total-size=30G --file-test-mode=rndrw prepare
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
128 files, 245760Kb each, 30720Mb total
Creating files for the test...
Extra file open flags: (none)
Creating file test_file.0
Creating file test_file.1
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32212254720 bytes written in 55.25 seconds (556.00 MiB/sec).
[root@localhost storage]# sysbench --test=fileio --num-threads=16 --file-total-size=30G --file-test-mode=rndrw run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 16
Initializing random number generator from current time
Extra file open flags: (none)
128 files, 240MiB each
30GiB total file size
Block size 16KiB
Number of IO requests: 0
Read/Write ratio for combined random IO test: 1.50
Periodic FSYNC enabled, calling fsync() each 100 requests.
Calling fsync() at the end of test, Enabled.
Using synchronous I/O mode
Doing random r/w test
Initializing worker threads...
Threads started!
Throughput:
read: IOPS=68491.05 1070.17 MiB/s (1122.16 MB/s)
write: IOPS=45660.96 713.45 MiB/s (748.11 MB/s)
fsync: IOPS=146103.57
Latency (ms):
min: 0.00
avg: 0.06
max: 3.61
95th percentile: 0.31
sum: 156128.82
可以看到，磁盘的读IOPS可以达到68491.05,写IOPS可以达到45660.96，fsync可以达到146103.57
3.线程测试
[root@localhost storage]# sysbench --test=threads --num-threads=64 --thread-yields=100 --thread-locks=2 run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 64
Initializing random number generator from current time
Initializing worker threads...
Threads started!
Throughput:
events/s (eps): 14851.1802
time elapsed: 10.0036s
total number of events: 148565
Latency (ms):
min: 0.02
avg: 4.31
max: 24.49
95th percentile: 10.46
sum: 639889.93
Threads fairness:
events (avg/stddev): 2321.3281/42.94
execution time (avg/stddev): 9.9983/0.00
(发送64次/个测试线程请求，每次/个线程请求产生/生成100个数量，每个线程的锁数量为2) ，测试执行时间为10秒
4.内存测试
[root@localhost storage]# sysbench --test=memory --memory-block-size=8k --memory-total-size=40G run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 1
Initializing random number generator from current time
Running memory speed test with the following options:
block size: 8KiB
total size: 40960MiB
operation: write
scope: global
Initializing worker threads...
Threads started!
Total operations: 5242880 (1443403.42 per second)
40960.00 MiB transferred (11276.59 MiB/sec)
Throughput:
events/s (eps): 1443403.4239
time elapsed: 3.6323s
total number of events: 5242880
Latency (ms):
min: 0.00
avg: 0.00
max: 0.02
95th percentile: 0.00
sum: 2926.10
Threads fairness:
events (avg/stddev): 5242880.0000/0.00
execution time (avg/stddev): 2.9261/0.00
上述参数指定了本次测试整个过程是在内存中传输 40G 的数据量，每个 block 大小为 8K。测试结果显示：
执行时间为3.6323秒，每秒传输速度为11276.59Mb每秒
5.OLTP测试
(1)100线程
数据准备：
[root@localhost storage]# sysbench /usr/local/share/sysbench/oltp_common.lua \
> --mysql-user=tpcc --mysql-password=tpcc --mysql-socket=/tmp/mysql3306.sock \
> --tables=10 --table_size=20000000 --threads=100 --max-requests=0 prepare
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)
Initializing worker threads...
Creating table 'sbtest1'...
Creating table 'sbtest4'...
Creating table 'sbtest2'...
Creating table 'sbtest9'...
Creating table 'sbtest6'...
Creating table 'sbtest8'...
Creating table 'sbtest7'...
Creating table 'sbtest5'...
Creating table 'sbtest10'...
Creating table 'sbtest3'...
Inserting 20000000 records into 'sbtest1'
Inserting 20000000 records into 'sbtest7'
Inserting 20000000 records into 'sbtest4'
Inserting 20000000 records into 'sbtest9'
Inserting 20000000 records into 'sbtest6'
Inserting 20000000 records into 'sbtest8'
Inserting 20000000 records into 'sbtest2'
Inserting 20000000 records into 'sbtest5'
Inserting 20000000 records into 'sbtest3'
Inserting 20000000 records into 'sbtest10'
Creating a secondary index on 'sbtest4'...
Creating a secondary index on 'sbtest1'...
Creating a secondary index on 'sbtest10'...
Creating a secondary index on 'sbtest3'...
Creating a secondary index on 'sbtest6'...
Creating a secondary index on 'sbtest8'...
Creating a secondary index on 'sbtest7'...
Creating a secondary index on 'sbtest9'...
Creating a secondary index on 'sbtest5'...
Creating a secondary index on 'sbtest2'...
开始测试：
[root@localhost storage]# sysbench /usr/local/share/sysbench/oltp_read_write.lua --mysql-host=localhost --mysql-port=3306 --mysql-db=sbtest --mysql-user=tpcc --mysql-password=tpcc --table_size=20000000 --tables=10 --threads=100 --time=3600 --report-interval=10 --mysql-socket=/tmp/mysql3306.sock run > /tmp/40_100.log
测试过程中，可以tail -f /tmp/40_100.log查看输出
测试结果：这里只展示统计部分
SQL statistics:
queries performed:
read: 143195290
write: 40912940
other: 20456470
total: 204564700
transactions: 10228235 (2841.15 per sec.)
queries: 204564700 (56823.07 per sec.)
ignored errors: 0 (0.00 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 2841.1536
time elapsed: 3600.0289s
total number of events: 10228235
Latency (ms):
min: 2.49
avg: 35.19
max: 2017.54
95th percentile: 39.65
sum: 359973625.38
Threads fairness:
events (avg/stddev): 102282.3500/5194.20
execution time (avg/stddev): 3599.7363/0.01
(2)200线程
数据准备：
[root@localhost storage]# sysbench /usr/local/share/sysbench/oltp_common.lua \
> --mysql-user=tpcc --mysql-password=tpcc --mysql-socket=/tmp/mysql3306.sock \
> --tables=10 --table_size=20000000 --threads=200 --max-requests=0 prepare
开始测试：
[root@localhost storage]# sysbench /usr/local/share/sysbench/oltp_read_write.lua \
--mysql-host=localhost --mysql-port=3306 --mysql-db=sbtest --mysql-user=tpcc \
--mysql-password=tpcc --table_size=20000000 --tables=10 --threads=200 --time=3600 \
--report-interval=10 --mysql-socket=/tmp/mysql3306.sock run > /tmp/40_200.log
测试结果：
SQL statistics:
queries performed:
read: 142876258
write: 40821788
other: 20410894
total: 204108940
transactions: 10205447 (2834.80 per sec.)
queries: 204108940 (56696.02 per sec.)
ignored errors: 0 (0.00 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 2834.8009
time elapsed: 3600.0577s
total number of events: 10205447
Latency (ms):
min: 2.39
avg: 70.55
max: 2011.65
95th percentile: 80.03
sum: 719978372.22
Threads fairness:
events (avg/stddev): 51027.2350/3840.19
execution time (avg/stddev): 3599.8919/0.02
(3)300线程
数据准备：
[root@localhost storage]# sysbench /usr/local/share/sysbench/oltp_common.lua \
> --mysql-user=tpcc --mysql-password=tpcc --mysql-socket=/tmp/mysql3306.sock \
> --tables=10 --table_size=20000000 --threads=300 --max-requests=0 prepare
开始测试：
sysbench /usr/local/share/sysbench/oltp_read_write.lua \
--mysql-host=localhost --mysql-port=3306 --mysql-db=sbtest \
--mysql-user=tpcc --mysql-password=tpcc --table_size=20000000 --tables=10 --threads=300 \
--time=3600 --report-interval=10 --mysql-socket=/tmp/mysql3306.sock run > /tmp/40_300.log
测试结果：
SQL statistics:
queries performed:
read: 144281438
write: 41223268
other: 20611634
total: 206116340
transactions: 10305817 (2862.66 per sec.)
queries: 206116340 (57253.12 per sec.)
ignored errors: 0 (0.00 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 2862.6561
time elapsed: 3600.0891s
total number of events: 10305817
Latency (ms):
min: 2.64
avg: 104.79
max: 4576.60
95th percentile: 123.28
sum: 1079986824.04
Threads fairness:
events (avg/stddev): 34352.7233/2459.96
execution time (avg/stddev): 3599.9561/0.03
生成压测图
安装gnuplot
plot 'D:\40_100.log' using 9 with linepoint title '100 threads','D:\40_200.log' using 9 with linepoint title '200 threads','D:\40_300.log' using 9 with linepoint title '300 threads';
多线程QPS对比图
多线程TPS对比图
三、压测注意事项
1.在OLTP测试过程中，数据库初始化后，冷备data目录，每次测试完毕后删除当前数据目录，拷贝data目录重新启动，为的是每次开始测试前环境保持一致。
2.测试完成后，需要再系统层做一些清理的工作
shell>sync #刷新脏数据到磁盘
shell>echo 3 >/proc/sys/vm/drop_cache #清除cache
shell>swapoff -a && swapon -a 释放swap
3.压测过程中需要修改参数max_prepared_stmt_count默认为16382，修改为65536
4.如果是SSD硬盘的话，innodb_io_capacity和innodb_io_capacity_max两个参数也要相应调大，建议调整到50000以上。
5.对于测试数据的准备，我们通过show engine innodb status观察Free buffers,尽量模拟生产环境，让测试数据填满整个buffer pool。我这里innodb_buffer_pool_size设置的40G，测试表数量10张，每张表数据2000万，差不多填满buffer pool。
下篇会给大家带来InnoDB引擎和TokuDB引擎的压力测试。
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