2009年
-
编辑 删除
8.0.5是不支持case语句的
8.0.5是不支持case语句的[@more@]今天碰到这么个案例,只能够用decode替换。
-
编辑 删除
Why does my system swaps the data instead of freeing cache and buffer memory?
Why does my system swaps the data instead of freeing cache and buffer memory?[@more@]The kernel uses heuristics to guess which pages of memory are likely to be needed in the near future, and tries to keep those pages in memory, regardless of whether they belong to processes or kernel caches. It is normal for the kernel to swap out process memory even when there is plenty of cache memory that could be easily freed. The kernel heuristics can be tuned by changing the vm.swappiness parameter of
