[Gluster-devel] High memory cost of glusterfsd when enable quota

[Kinglong Mee]

I use glusterfs quota on Centos7 with glusterfs-3.10.2-1.el7.x86_64, system memory is 2GB.
My test environment is two glustefs nodes, with one 10GB disk (ext4) each.

When enable quota with many files in the glusterfs, the glusterfsd in one node
costs high memory towards 40%+ of 2GB, or both nodes costs high memory sometimes.

Node one,
   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 30017 root      20   0 1487412 115528   4648 S   0.0  6.2   3:11.81 glusterfsd

The other node,
   PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
102510 root      20   0 1439044 700264   4668 S  0.0 37.5   2:31.37 glusterfsd

The reproduce is,
# gluster volume start fsname
# mount -t glusterfs nodename:fsname /mnt/test/
# cp -rf linux-source /mnt/test/           <---- it's important adds many files before enable quota.
# gluster volume quota fsname enable

Sometime, needs disable quota and re-enable again, the high memory cost will appear.

But, I can't find the high memory cost when debugging by valgrind,
the memory cost will increase slowly to 10%.

Any comments are welcome.

thanks,
Kinglong Mee