总结一:memcache官方定义Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.redis官方定义Redi..
背景公司的redis有时background save db不成功,通过log发现下面的告警,很可能由它引起的:[13223] 17 Mar 13:18:02.207 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add ..
如果启动前不对linux内核做任何更改,那么redis启动会报出警告,共三个:如下图所示第一个警告:The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.意思是:TCP backlog..