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Redis 客户端连接

发布时间：2021-11-21 14:41:35编辑：雪饮阅读（）

 maxclients 的默认值是 10000，你也可以在 redis.conf 中对这个值进行修改。

127.0.0.1:6379> config get maxclients
1) "maxclients"
2) "10000"
你比如说我这里默认是对maxclients注释的，那么我修改成100001
[root@localhost ~]# cat /usr/local/redis-6.2.5/redis.conf | grep maxclients
 maxclients 100001
然后关闭之前的redis服务并以修改后的redis配置文件进行加载启动：
[root@localhost ~]# /usr/local/redis-6.2.5/src/redis-server /usr/local/redis-6.2.5/redis.conf &
[1] 46961
[root@localhost ~]# 46961:C 21 Nov 2021 01:35:52.967 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
46961:C 21 Nov 2021 01:35:52.967 # Redis version=6.2.5, bits=64, commit=00000000, modified=0, pid=46961, just started
46961:C 21 Nov 2021 01:35:52.967 # Configuration loaded
46961:M 21 Nov 2021 01:35:52.967 * Increased maximum number of open files to 100033 (it was originally set to 1024).
46961:M 21 Nov 2021 01:35:52.967 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 6.2.5 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 46961
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'
 
46961:M 21 Nov 2021 01:35:52.999 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
46961:M 21 Nov 2021 01:35:52.999 # Server initialized
46961:M 21 Nov 2021 01:35:52.999 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
46961:M 21 Nov 2021 01:35:53.015 * Loading RDB produced by version 6.2.5
46961:M 21 Nov 2021 01:35:53.015 * RDB age 487673 seconds
46961:M 21 Nov 2021 01:35:53.015 * RDB memory usage when created 0.84 Mb
46961:M 21 Nov 2021 01:35:53.015 * DB loaded from disk: 0.016 seconds
46961:M 21 Nov 2021 01:35:53.015 * Ready to accept connections
然后用一个客户端连接这个新开的redis服务就可以看到maxclients已经修改成功了。
[root@localhost ~]# /usr/local/redis-6.2.5/src/redis-cli
127.0.0.1:6379> ping
PONG
127.0.0.1:6379> config get maxclients
1) "maxclients"
2) "100001"
当然除了在配置文件上面能修改，其实也可以直接在redis-server启动服务时候带上--maxclients参数即可：
[root@localhost ~]# /usr/local/redis-6.2.5/src/redis-server --maxclients 220807 &
[1] 47992
[root@localhost ~]# 47992:C 21 Nov 2021 01:38:44.841 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
47992:C 21 Nov 2021 01:38:44.841 # Redis version=6.2.5, bits=64, commit=00000000, modified=0, pid=47992, just started
47992:C 21 Nov 2021 01:38:44.841 # Configuration loaded
47992:M 21 Nov 2021 01:38:44.842 * Increased maximum number of open files to 220839 (it was originally set to 1024).
47992:M 21 Nov 2021 01:38:44.842 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 6.2.5 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 47992
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'
 
47992:M 21 Nov 2021 01:38:44.844 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
47992:M 21 Nov 2021 01:38:44.844 # Server initialized
47992:M 21 Nov 2021 01:38:44.844 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
47992:M 21 Nov 2021 01:38:44.844 * Loading RDB produced by version 6.2.5
47992:M 21 Nov 2021 01:38:44.844 * RDB age 4 seconds
47992:M 21 Nov 2021 01:38:44.844 * RDB memory usage when created 11.40 Mb
47992:M 21 Nov 2021 01:38:44.844 * DB loaded from disk: 0.000 seconds
47992:M 21 Nov 2021 01:38:44.844 * Ready to accept connections
然后客户端同样能读取到这个--maxclients的值。
[root@localhost ~]# /usr/local/redis-6.2.5/src/redis-cli
127.0.0.1:6379> ping
PONG
127.0.0.1:6379> config get maxclients
1) "maxclients"
2) "220807"