参考链接:
https://blog.csdn.net/21cnbao/article/details/80458173
https://github.com/tobert/pcstat
https://www.brendangregg.com/blog/2014-12-31/linux-page-cache-hit-ratio.html
TestDFSIO Benchmark 命中率情况
以下是 2TB,在 3个 node 上的测试结果。
728G
# free -gtotal usedfreeshared buff/cache available Mem:75144391679