[Bugs] [Bug 1369364] Huge memory usage of FUSE client

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1369364



--- Comment #17 from Oleksandr Natalenko <oleksandr at natalenko.name> ---
Okay, I've finally managed how to deal with Massif tool, and here are the
results.

Volume layout and options are the same as pointed in this BZ description. After
mount RSS is 90M, after performing this command for some time (there are
millions of files):

===
find /mnt/net/glusterfs/test -print0 | xargs -0 stat >/dev/null
===

RSS grows to 900M (and counting). VSZ also grows from ~400M to ~1200M (and
counting). Performing drop_caches lowers RSS/VSZ usage only by ~100M.

There are 3 Massif logs attached, the main is for PID 23664. Also, I attach
client statedump.

drop_caches was called before taking statedump and unmounting the volume.

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