centos - 如何清除 OpenVZ 中的缓存？

Question

我有 OpenVZ VPS，但在清除缓存时遇到问题:

在 OpenVZ 中不工作 echo 3 >/proc/sys/vm/drop_caches

这个缓存怎么清除？

Answer 1

这是 reported在 OpenVZ 错误跟踪器上。它已被解析为 RESOLVED WONTFIX

来自 Kir Kolyshkin在bug report (OpenVZ项目负责人):

All containers share the same page cache (although there is per-container accounting), so to drop caches of one single container we have to check each page:

1 Whether it belongs to the container or not -- supposing we do have that information, which I am not sure of

2 Whether this page is used by other containers.

So, while this is trivial on the host system, it is much less trivial for a container. And this is not a critical piece of functionality -- drop_caches is only useful for running various sorts of benchmarks.

由于您没有使用 OpenVZ 获得自己的内核实例，因此您无法运行该命令。