redis：redis-benchmark

女爷i 2022-09-15 11:44 170阅读 0赞

redis-benchmark可以为redis做基准性测试，它提供了很多选项帮助开发和运维人员测试redis的相关属性

# 选项 #

Usage: redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]
    
     -h <hostname>      Server hostname (default 127.0.0.1)
     -p <port>          Server port (default 6379)
     -s <socket>        Server socket (overrides host and port)
     -a <password>      Password for Redis Auth
     -c <clients>       Number of parallel connections (default 50)
     -n <requests>      Total number of requests (default 100000)
     -d <size>          Data size of SET/GET value in bytes (default 2)
     --dbnum <db>       SELECT the specified db number (default 0)
     -k <boolean>       1=keep alive 0=reconnect (default 1)
     -r <keyspacelen>   Use random keys for SET/GET/INCR, random values for SADD
      Using this option the benchmark will expand the string __rand_int__
      inside an argument with a 12 digits number in the specified range
      from 0 to keyspacelen-1. The substitution changes every time a command
      is executed. Default tests use this to hit random keys in the
      specified range.
     -P <numreq>        Pipeline <numreq> requests. Default 1 (no pipeline).
     -q                 Quiet. Just show query/sec values
     --csv              Output in CSV format
     -l                 Loop. Run the tests forever
     -t <tests>         Only run the comma separated list of tests. The test
                        names are the same as the ones produced as output.
     -I                 Idle mode. Just open N idle connections and wait.

## \-c、-n ##

*  `-c（clients）`选项代表客户端的并发数量
 *  \-`n（num）`选项代表客户端请求总量（默认是10000）。

例如redis-benchmark -c 100 -n 20000代表100个客户端同时请求Redis，一共执行20000次。

redis-benchmark会对各类数据结构的命令进行测试，并给出性能指标

====== GET ======
      20000 requests completed in 0.17 seconds
      100 parallel clients
      3 bytes payload
      keep alive: 1
    
    95.92% <= 1 milliseconds
    99.75% <= 2 milliseconds
    100.00% <= 2 milliseconds
    116959.06 requests per second

例如上面一共执行了20000次操作，在0.17秒完成，每个请求是3个字节，95.92%的命令执行时间小于1毫秒，Redis每秒可以处理116959.06次get请求。

## \-q ##

\-q选项仅仅显示redis-benchmark的requests per second1信息：

[root@Redis ~]# redis-benchmark -c 100 -n 20000 -q
    PING_INLINE: 113636.37 requests per second
    PING_BULK: 121951.22 requests per second
    SET: 115606.94 requests per second
    GET: 118343.20 requests per second
    INCR: 116959.06 requests per second
    LPUSH: 113636.37 requests per second
    LPOP: 113636.37 requests per second
    SADD: 114285.72 requests per second
    SPOP: 108695.65 requests per second
    LPUSH (needed to benchmark LRANGE): 104166.66 requests per second
    LRANGE_100 (first 100 elements): 46403.71 requests per second
    LRANGE_300 (first 300 elements): 19940.18 requests per second
    LRANGE_500 (first 450 elements): 11750.88 requests per second
    LRANGE_600 (first 600 elements): 11117.29 requests per second
    MSET (10 keys): 85470.09 requests per second

## \-r：向redis插入更多的随机键 ##

一个空的Redis上执行了redis-benchmark会发现只有三个键：

[root@chenxing2 redis]# redis-cli
    127.0.0.1:6379> dbsize
    (integer) 3
    127.0.0.1:6379> keys *
    1) "key:__rand_int__"
    2) "counter:__rand_int__"
    3) "mylist"

如果想向Redis插入更多的键，可以执行使用-r（random）选项，可以向Redis插入更多的随机键。

[root@chenxing2 redis]#  redis-benchmark -c 100 -n 20000 -r 10000

\-r选项会在key、counter键上加一个12位的后缀，-r 10000代表只对后四位做随机处理（-r不是随机数的个数），

例如上面操作后，key的数量和结果结构如下：

127.0.0.1:6379> dbsize
    (integer) 18656
    127.0.0.1:6379> scan 0
    1) "5120"
    2)  1) "counter:000000002683"
        2) "key:000000008908"
        3) "counter:000000005887"
        4) "counter:000000008039"
        5) "key:000000001037"
        6) "key:000000004592"
        7) "counter:000000003728"
        8) "counter:000000009443"
        9) "counter:000000000413"
       10) "key:000000009427"

## \-p ##

\-p选项代表每个请求pipline的数据量（默认位1）.

## \-k < boolean> ##

\-k选项代表客户端是否使用keepalive，1为使用，0为不使用，默认值为1.

## \-t ##

\-t选项可以对指定命令进行基准测试

[root@chenxing2 redis]#  redis-benchmark -t get,set -q
    SET: 96246.39 requests per second
    GET: 106951.88 requests per second

## –csv ##

–csv选项会将结果按照CSV格式输出，便于后续处理，如导出到Execl等。

[root@chenxing2 redis]#  redis-benchmark -t get,set -q --csv
    "SET","101010.10"
    "GET","106837.61"