如何解决redis启动时的三个警告
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Redis安装后直接启动会提示三个错误,如下:
[lb@centos-linux src]$ ./redis-server 1988:C 19 Apr 2021 00:33:16.869 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 1988:C 19 Apr 2021 00:33:16.869 # Redis version=6.2.1, bits=64, commit=00000000, modified=0, pid=1988, just started 1988:C 19 Apr 2021 00:33:16.869 # Warning: no config file specified, using the default config. In order to specify a config file use ./redis-server /path/to/redis.conf 1988:M 19 Apr 2021 00:33:16.870 # You requested maxclients of 10000 requiring at least 10032 max file descriptors. 1988:M 19 Apr 2021 00:33:16.870 # Server can't set maximum open files to 10032 because of OS error: Operation not permitted. 1988:M 19 Apr 2021 00:33:16.870 # Current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase 'ulimit -n'. 1988:M 19 Apr 2021 00:33:16.870 * monotonic clock: POSIX clock_gettime _._ _.-``__ ''-._ _.-`` `. `_. ''-._ Redis 6.2.1 (00000000/0) 64 bit .-`` .-```. ```\/ _.,_ ''-._ ( ' , .-` | `, ) Running in standalone mode |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379 | `-._ `._ / _.-' | PID: 1988 `-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-' 1988:M 19 Apr 2021 00:33:16.872 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. 1988:M 19 Apr 2021 00:33:16.872 # Server initialized 1988:M 19 Apr 2021 00:33:16.872 # 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. 1988:M 19 Apr 2021 00:33:16.872 * Ready to accept connections
为解决这个问题,可已通过如下配置进行解决,具体操作如下:
修改linux系统配置
[root@centos-linux lb]# vim /etc/sysctl.conf
添加配置
net.core.somaxconn = 1024 vm.overcommit_memory = 1
添加完成后,刷新内核参数,立即生效
[redis-5.0.8]$ /sbin/sysctl -p
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