[Bugs] [Bug 1558379] Huge memory usage of FUSE client

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1558379



--- Comment #15 from Xavi Hernandez <jahernan at redhat.com> ---
(In reply to Yannick Perret from comment #13)
> But when I remove all files from the FS − I still performed several 'rm -rf
> MNT/*' − top of heap (which should have hold stuff about last files
> operations) should be free, and this memory should returns to the system.
> This is not the case so far: after a total cleanup of FS content the
> glusterfs process stay at the same memory value.

This is not always true. While gluster is running, it uses memory for many
internal operations that are not directly related to cached data. So even after
having deleted all files, Gluster will still be using some memory, and it can
happen that one of these blocks of memory comes from the top of the heap if it
has been allocated (or reallocated) while data was being processed.

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