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🔥 pgcacher is used to get page cache stats for files on Linux. ( 分析 page cache 缓存了哪些文件,文件在 page cache 的缓存占比)

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If I ran a pod in a Kubernetes environment, I could get the pid by using ps -ef of the process running inside the container. When I run ./pgcacher -pid=49573...

请问buff/cache中显示的值远大于pgcacher中显示的值,这说明了什么?我问了gpt,当一个文件被删除后,buff/cache中依然可能会占用空间,那么这一部分的空间有办法知道是什么吗?