Re: using swap when there is free ram
- Date: Fri, 1 Mar 2019 19:34:50 +0100
- From: Pascal Hambourg <pascal@xxxxxxxxxxxxxxx>
- Subject: Re: using swap when there is free ram
Le 01/03/2019 à 18:56, Reco a écrit :
First, there's huge amount of unused (not to be confused with "free")
memory on your host. And no, it's not a filesystem's cache (600M), it's
really "nothing there"-unused memory which amounts 1880M.
This is the amount reported in /proc/meminfo as MemFree - not MemUnused.
Can you please explain your definitions of "free" and "unused" memory ?
Taking it all into the account, I propose the following scenario - not a
long time ago there was a process (or a couple of those). Was it the
browser, or something written in Java (or Python), or some kind of
Virtual Machine - is not relevant, but it did consume RAM. But it got
terminated, and what we're seeing here is the aftermath.
Another scenario : at some point the pagecache (file cache) grew much
bigger due to massive file read/write operation, then the files were
deleted or the filesystem was unmounted and the file cache pages were freed.