sysbench對數據庫進行壓力測試

sysbench是一款壓力測試工具，可以測試系統的硬件性能，也可以用來對數據庫進行基準測試。

安裝方式：https://github.com/akopytov/sysbench/blob/master/README.md#general-command-line-options

此處安裝的是sysbench 1.0.6版本，和網上大部分的0.4，0.5版本的命令不太一樣。

sysbench支持三種測試方案：

1、使用自帶的測試模塊，如對cpu,I/O,memory等的測試。

2、使用自帶的lua腳本進行測試，如果使用快速安裝的方式，默認的腳本路徑為：/usr/share/sysbench

3、使用自定義的lua腳本。

獲取幫助信息：

如果對相關模塊或者腳本的參數不明確的，可以使用 sysbench  testname help來查看，testname含模塊名稱和腳本名稱。

sysbench經典測試命令：

• prepare: 創建測試數據或者相關的測試文件，為測試做準備工作。如數據庫的測試數據準備等。

• run: 開始執行測試。

• cleanup: 移除測試數據

• help: 幫助命令

測試CPU性能

sysbench cpu --cpu-max-prime=10000 run

#顯示測試結果
General statistics:
    total time:                          10.0003s
    total number of events:              8692

Latency (ms):
         min:                                  1.12
         avg:                                  1.15
         max:                                  2.98
         95th percentile:                      1.25
         sum:                               9996.64

Threads fairness:
    events (avg/stddev):           8692.0000/0.00
    execution time (avg/stddev):   9.9966/0.00

I/O測試

準備測試數據：

sysbench fileio --file-total-size=40G prepare

運行順序寫入測試：

sysbench fileio --file-total-size=40G --file-test-mode=seqwr run

#測試結果
File operations:
    reads/s:                      0.00
    writes/s:                     3916.87
    fsyncs/s:                     5001.01

Throughput:
    read, MiB/s:                  0.00
    written, MiB/s:               61.20

General statistics:
    total time:                          10.0055s
    total number of events:              89250

Latency (ms):
         min:                                  0.01
         avg:                                  0.11
         max:                                 28.02
         95th percentile:                      0.12
         sum:                               9937.24

Threads fairness:
    events (avg/stddev):           89250.0000/0.00
    execution time (avg/stddev):   9.9372/0.00

運行順序重寫測試：

sysbench fileio --file-total-size=40G --file-test-mode=seqrewr run

#測試結果：

File operations:
    reads/s:                      0.00
    writes/s:                     4018.65
    fsyncs/s:                     5131.38
Throughput:
    read, MiB/s:                  0.00
    written, MiB/s:               62.79
General statistics:
    total time:                          10.0003s
    total number of events:              91531
Latency (ms):
         min:                                  0.00
         avg:                                  0.11
         max:                                 31.45
         95th percentile:                      0.10
         sum:                               9933.80
Threads fairness:
    events (avg/stddev):           91531.0000/0.00
    execution time (avg/stddev):   9.9338/0.00

混合隨機讀/寫：（如果執行出錯，需要重新prepare數據）

sysbench fileio --file-total-size=40G --file-test-mode=rndrw  --max-time=100 --max-requests=0 run
#測試結果：

File operations:
    reads/s:                      338.98
    writes/s:                     225.99
    fsyncs/s:                     722.23

Throughput:
    read, MiB/s:                  5.30
    written, MiB/s:               3.53

General statistics:
    total time:                          100.0007s
    total number of events:              128727

Latency (ms):
         min:                                  0.00
         avg:                                  0.78
         max:                                 43.01
         95th percentile:                      2.97
         sum:                              99785.92

Threads fairness:
    events (avg/stddev):           128727.0000/0.00
    execution time (avg/stddev):   99.7859/0.00

清除測試數據：

sysbench fileio --file-total-size=40G cleanup

OLTP基準測試

OLTP基準測試模擬了一個簡單的事務處理系統的工作負載。若要對數據庫性能進行測試就要使用OLTP相關的腳本。

在/usr/share/sysbench/目錄下有相關的lua腳本：

bulk_insert.lua
oltp_common.lua
oltp_delete.lua
oltp_insert.lua
oltp_point_select.lua
oltp_read_only.lua
oltp_read_write.lua
oltp_update_index.lua
oltp_update_non_index.lua
oltp_write_only.lua
select_random_points.lua
select_random_ranges.lua

對于未知的測試參數，可以通過 sysbench  scripts-name help 來查看。

創建測試數據：

sysbench oltp_common  --table-size=1000000 --db-driver=mysql \
--mysql-db=test --mysql-user=root --mysql-password=123456  prepare


Creating table 'sbtest1'...
Inserting 1000000 records into 'sbtest1'
Creating a secondary index on 'sbtest1'...

執行run命令進行測試：（只讀）

sysbench oltp_read_only  --table-size=1000000 --db-driver=mysql \
 --mysql-db=test --mysql-user=root --mysql-password=123456 --time=60  --max-requests=0 --threads=8 run
#測試結果
 
Running the test with following options:
Number of threads: 8
Initializing random number generator from current time
Initializing worker threads...
Threads started!
SQL statistics:
    queries performed:
        read:                            1679174
        write:                           0
        other:                           239882
        total:                           1919056
    transactions:                        119941 (1998.81 per sec.)
    queries:                             1919056 (31980.95 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)
General statistics:
    total time:                          60.0047s
    total number of events:              119941
Latency (ms):
         min:                                  0.32
         avg:                                  4.00
         max:                                 56.17
         95th percentile:                      8.13
         sum:                             479830.78
Threads fairness:
    events (avg/stddev):           14992.6250/116.75
    execution time (avg/stddev):   59.9788/0.00

除了使用read_only測試，我們還可以測試數據庫的寫性能：

sysbench oltp_write_only  --table-size=1000000 --db-driver=mysql \
 --mysql-db=test --mysql-user=root --mysql-password=123456 --time=60  --max-requests=0 --threads=8 run
#測試結果

SQL statistics:
    queries performed:
        read:                            0
        write:                           83764
        other:                           41882
        total:                           125646
    transactions:                        20941  (348.93 per sec.)
    queries:                             125646 (2093.56 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)
General statistics:
    total time:                          60.0120s
    total number of events:              20941
Latency (ms):
         min:                                  4.92
         avg:                                 22.92
         max:                               5518.27
         95th percentile:                     69.29
         sum:                             479968.99
Threads fairness:
    events (avg/stddev):           2617.6250/17.87
    execution time (avg/stddev):   59.9961/0.00

上面的結果中包含了很多的信息，其中重點需要我們關注的信息是：

1、總的事務數 （total number of events）

2、每秒事務數

3、時間統計信息（最小，平均，最大響應時間，以及95%百分比響應時間）

4、線程公平性統計信息，表示負載的公平性。（thread-fairness)

清理測試數據：

sysbench oltp_read_only  --table-size=1000000 --db-driver=mysql \
 --mysql-db=test --mysql-user=root --mysql-password=123456 cleanup