sysbench自訂lua指令碼實現實際的商務邏輯壓力測試

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使用sysbench進行mysql的oltp測試,一般的測試在sysbench中在tests/db中提供了一個oltp.lua指令碼可以進行oltp的壓力測試。
但不能完全類比自己實際業務的壓力測試,不同的業務,資料結構,資料量都是不一樣的,為了更接近實際業務的讀寫壓力測試,就得自己寫lua指令碼,然後通過sysbench進行壓力測試。
寫這個lua指令碼很簡單,只需要會寫lua指令碼就可以了。

1、首先收集實際業務的訪問資料庫的sql;
2、準備一台恢複好的備份庫(從線上導一個)
3、將收集的sql寫在lua指令碼裡(具體如何寫,後面舉個例子)
4、通過sysbench的--test參數和--mysql-db參數進行測試(這裡就不需要prepare了,直接run就行)
舉個小例子
類比實際業務環境:

CREATE TABLE `t1` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10101 DEFAULT CHARSET=utf8
插入類比的際業務資料:

delimiter $$
create procedure add_data(in maxnum int)
begin
 declare i int default 0;
 declare s varchar(500);
 while(i<maxnum) do
  select concat("abcdedsfsfsdfsfsf",i) into s;
  insert into t1(name)values(s); 
  set i=i+1;
 end while;
end $$
delimiter ;
 
call add_data(10000);
準備lua指令碼:[root@sever3 db]# cat test.lua

function thread_init(thread_id)
   -- set_vars()
   db_connect()
end
 
function event(thread_id)
   local table_name
   local rs
   table_name = "t1"
        db_query("begin")
  for i=1, 10000 do
      rs = db_query("SELECT name FROM ".. table_name .." WHERE id=" .. i)
  end
end
set_vars()  如果需要使用更多的參數,需要執行這個,前面需要引用下common.lua
db_connect()   是串連資料庫的,這個是sysbench裡的函數,不管那麼多,直接用就行。
thread_init()  第一個調用的lua函數
event(thread_id)   可以把sql邏輯寫到這裡,   –num-threads多少個,就會同時調用多少個
然後進行壓測就ok


[root@sever3 sysbench]# ./sysbench --mysql-socket=/data/mysql_3309/mysql.sock --test=tests/db/test.lua --mysql-user=root --num-threads=12 --report-interval=10 --rand-type=uniform --max-time=30 --max-requests=0 --percentile=99 --mysql-db=test run
sysbench 0.5:  multi-threaded system evaluation benchmark
 
Running the test with following options:
Number of threads: 12
Report intermediate results every 10 second(s)
Random number generator seed is 0 and will be ignored
 
 
Threads started!
 
[  10s] threads: 12, tps: 0.00, reads/s: 64131.41, writes/s: 0.00, response time: 3291.51ms (99%)
[  20s] threads: 12, tps: 0.00, reads/s: 79980.83, writes/s: 0.00, response time: 1947.61ms (99%)
[  30s] threads: 12, tps: 0.00, reads/s: 78354.15, writes/s: 0.00, response time: 2418.21ms (99%)
OLTP test statistics:
    queries performed:
        read:                            2280000
        write:                           0
        other:                           228
        total:                           2280228
    transactions:                        0      (0.00 per sec.)
    deadlocks:                           0      (0.00 per sec.)
    read/write requests:                 2280000 (72705.35 per sec.)
    other operations:                    228    (7.27 per sec.)
 
General statistics:
    total time:                          31.3595s
    total number of events:              228
    total time taken by event execution: 368.0393s
    response time:
         min:                                985.61ms
         avg:                               1614.21ms
         max:                               3756.13ms
         approx.  99 percentile:            3289.54ms
 
Threads fairness:
    events (avg/stddev):           19.0000/3.83
    execution time (avg/stddev):   30.6699/0.42

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