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Redis必要的一些配置
[root@localhost202 redis-2.8.19]# /usr/local/redis/bin/redis-server >> /data/redis-start.txt #从定向到文件，方便我们查看，内容如下：
[root@localhost202 redis-2.8.19]# cat /data/redis-start.txt
[6033] 16 Jan 23:21:42.506 # Warning: no config file specified, using the default config. In order to specify a config file use /usr/local/redis/bin/redis-server /path/to/redis.conf[6033] 16 Jan 23:21:42.508 * Increased maximum number of open files to 10032 (it was originally set to 1024).[6033] 16 Jan 23:21:42.509 # Warning: 32 bit instance detected but no memory limit set. Setting 3 GB maxmemory limit with ‘noeviction‘ policy now. _._ _.-``__ ‘‘-._ _.-`` `. `_. ‘‘-._ Redis 2.8.19 (00000000/0) 32 bit .-`` .-```. ```\/ _.,_ ‘‘-._ ( ‘ , .-` | `, ) Running in stand alone mode |`-._`-...-` __...-.``-._|‘` _.-‘| Port: 6379 | `-._ `._ / _.-‘ | PID: 6033 `-._ `-._ `-./ _.-‘ _.-‘ |`-._`-._ `-.__.-‘ _.-‘_.-‘| | `-._`-._ _.-‘_.-‘ | http://redis.io `-._ `-._`-.__.-‘_.-‘ _.-‘ |`-._`-._ `-.__.-‘ _.-‘_.-‘| | `-._`-._ _.-‘_.-‘ | `-._ `-._`-.__.-‘_.-‘ _.-‘ `-._ `-.__.-‘ _.-‘ `-._ _.-‘ `-.__.-‘ [6033] 16 Jan 23:21:42.511 # Server started, Redis version 2.8.19[6033] 16 Jan 23:21:42.511 # 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.[6033] 16 Jan 23:21:42.511 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.[6033] 16 Jan 23:21:42.511 * DB loaded from disk: 0.000 seconds[6033] 16 Jan 23:21:42.511 * The server is now ready to accept connections on port 6379[6033 | signal handler] (1421421706) Received SIGINT scheduling shutdown...[6033] 16 Jan 23:21:46.643 # User requested shutdown...[6033] 16 Jan 23:21:46.643 * Saving the final RDB snapshot before exiting.[6033] 16 Jan 23:21:46.663 * DB saved on disk[6033] 16 Jan 23:21:46.663 # Redis is now ready to exit, bye bye...
1、增加配置文件
2、配置maxmemory
3、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.
配置：
- 为了防止内存爆满导致系统崩溃，需要设置/etc/redis/*.cnf中的maxmemory
- 防止报错，可以调整内存分配策略
/etc/sysctl.conf 这个是Redis日志中可以看到的建议： 添加vm.overcommit_memory=1保存，并执行：sysctl vm.overcommit_memory=1使之生效/proc/sys/vm/overcommit_memory,这个里面就是overcommit_memory值，这个可以被上面的设置更新. 0， 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。 1， 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。 2， 表示内核允许分配超过所有物理内存和交换空间总和的内存
Redis必要的一些配置
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