Also, I see lots of entries in pmap output:
===
00007ef9ff8f3000 4K ----- [ anon ]
00007ef9ff8f4000 8192K rw--- [ anon ]
00007efa000f4000 4K ----- [ anon ]
00007efa000f5000 8192K rw--- [ anon ]
===
If I sum them, I get the following:
===
# pmap 15109 | grep '[ anon ]' | grep 8192K | wc -l
9261
$ echo "9261*(8192+4)" | bc
75903156
===
Which is something like 70G+ I have got in VIRT.
06.06.2016 11:24, Oleksandr Natalenko написав:
Hello.
We use v3.7.11, replica 2 setup between 2 nodes + 1 dummy node for
keeping volumes metadata.
Now we observe huge VSZ (VIRT) usage by glustershd on dummy node:
===
root 15109 0.0 13.7 76552820 535272 ? Ssl тра26 2:11
/usr/sbin/glusterfs -s localhost --volfile-id gluster/glustershd -p
/var/lib/glusterd/glustershd/run/glustershd.pid -l
/var/log/glusterfs/glustershd.log -S
/var/run/gluster/7848e17764dd4ba80f4623aecb91b07a.socket
--xlator-option
*replicate*.node-uuid=80bc95e1-2027-4a96-bb66-d9c8ade624d7
===
that is ~73G. RSS seems to be OK (~522M). Here is the statedump of
glustershd process: [1]
Also, here is sum of sizes, presented in statedump:
===
# cat /var/run/gluster/glusterdump.15109.dump.1465200139 | awk -F '='
'BEGIN {sum=0} /^size=/ {sum+=$2} END {print sum}'
353276406
===
That is ~337 MiB.
Also, here are VIRT values from 2 replica nodes:
===
root 24659 0.0 0.3 5645836 451796 ? Ssl тра24 3:28
/usr/sbin/glusterfs -s localhost --volfile-id gluster/glustershd -p
/var/lib/glusterd/glustershd/run/glustershd.pid -l
/var/log/glusterfs/glustershd.log -S
/var/run/gluster/44ec3f29003eccedf894865107d5db90.socket
--xlator-option
*replicate*.node-uuid=a19afcc2-e26c-43ce-bca6-d27dc1713e87
root 18312 0.0 0.3 6137500 477472 ? Ssl тра19 6:37
/usr/sbin/glusterfs -s localhost --volfile-id gluster/glustershd -p
/var/lib/glusterd/glustershd/run/glustershd.pid -l
/var/log/glusterfs/glustershd.log -S
/var/run/gluster/1670a3abbd1eea968126eb6f5be20322.socket
--xlator-option
*replicate*.node-uuid=52dca21b-c81c-48b5-9de2-1ed37987fbc2
===
Those are 5 to 6G, which is much less than dummy node has, but still
look too big for us.
Should we care about huge VIRT value on dummy node? Also, how one
would debug that?
Regards,
Oleksandr.
[1] https://gist.github.com/d2cfa25251136512580220fcdb8a6ce6
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