On Fri, Jul 29, 2016 at 2:26 PM, Yannick Perret <yannick.perret@xxxxxxxxxxxxx> wrote:
Ok, last try:
after investigating more versions I found that FUSE client leaks memory on all of them.
I tested:
- 3.6.7 client on debian 7 32bit and on debian 8 64bit (with 3.6.7 serveurs on debian 8 64bit)
- 3.6.9 client on debian 7 32bit and on debian 8 64bit (with 3.6.7 serveurs on debian 8 64bit)=
- 3.7.13 client on debian 8 64bit (with 3.8.1 serveurs on debian 8 64bit)
- 3.8.1 client on debian 8 64bit (with 3.8.1 serveurs on debian 8 64bit)
In all cases compiled from sources, appart for 3.8.1 where .deb were used (due to a configure runtime error).
For 3.7 it was compiled with --disable-tiering. I also tried to compile with --disable-fusermount (no change).
In all of these cases the memory (resident & virtual) of glusterfs process on client grows on each activity and never reach a max (and never reduce).
"Activity" for these tests is cp -Rp and ls -lR.
The client I let grows the most overreached ~4Go RAM. On smaller machines it ends by OOM killer killing glusterfs process or glusterfs dying due to allocation error.
In 3.6 mem seems to grow continusly, whereas in 3.8.1 it grows by "steps" (430400 ko → 629144 (~1min) → 762324 (~1min) → 827860…).
All tests performed on a single test volume used only by my test client. Volume in a basic x2 replica. The only parameters I changed on this volume (without any effect) are diagnostics.client-log-level set to ERROR and network.inode-lru-limit set to 1024.
Could you attach statedumps of your runs?
The following link has steps to capture this(https://gluster.readthedocs.io/en/latest/Troubleshooting/statedump/ ). We basically need to see what are the memory types that are increasing. If you could help find the issue, we can send the fixes for your workload. There is a 3.8.2 release in around 10 days I think. We can probably target this issue for that?
The following link has steps to capture this(https://gluster.readthedocs.io/en/latest/Troubleshooting/statedump/ ). We basically need to see what are the memory types that are increasing. If you could help find the issue, we can send the fixes for your workload. There is a 3.8.2 release in around 10 days I think. We can probably target this issue for that?
This clearly prevent us to use glusterfs on our clients. Any way to prevent this to happen? I still switched back to NFS mounts but it is not what we're looking for.
Regards,
--
Y.
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Pranith
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