Hi all,
How much memory do you need to run Koha?
I run a database with about 22000 records on a virtual server on Digital Ocean
with 1GB memory and very low usage, but the server is crashing very often.
With dmesg I find this kind of messages several times a day:
[Sun Mar 18 16:10:10 2018] addbiblio.pl invoked oom-killer:
gfp_mask=0x24201ca, order=0, oom_score_adj=0
[Sun Mar 18 16:10:10 2018] addbiblio.pl cpuset=/ mems_allowed=0
And then MySQL crashes and restarts:
Sun Mar 18 16:10:10 2018] Out of memory: Kill process 6539 (mysqld) score 222
or sacrifice child
[Sun Mar 18 16:10:10 2018] Killed process 6539 (mysqld) total-vm:1538124kB,
anon-rss:224948kB, file-rss:0kB
From /var/log/syslog:
Mar 18 16:10:11 biblioteko systemd[1]: mysql.service: Main process exited,
code=killed, status=9/KILL
Mar 18 16:10:11 biblioteko systemd[1]: mysql.service: Unit entered failed
state.
Mar 18 16:10:11 biblioteko systemd[1]: mysql.service: Failed with result
'signal'.
Mar 18 16:10:11 biblioteko systemd[1]: mysql.service: Service hold-off time
over, scheduling restart.
Mar 18 16:10:11 biblioteko systemd[1]: Stopped MySQL Community Server.
Mar 18 16:10:11 biblioteko systemd[1]: Starting MySQL Community Server...
Just yesterday the killed process was rebuild_zebra.p, which didn't restart,
and Koha was retrieving no results for searches.
The strange thing is that Digital Ocean's own monitoring tool never reports
such memory spikes: usage is usually high but never more than 80%. Maybe the
spikes are too short? What would you recommend for a more fine-grained
monitoring of memory?
Right now my memory is this:
root@biblioteko:~# free
total used free shared buff/cache
available
Mem: 1016056 555304 266328 14936 194424
292164
Swap: 0 0 0
On file /etc/mysql/mysql.conf.d/mysqld.cnf the value of
"innodb_buffer_pool_size" is 385M, if that's of any help.
Do I really need more physical memory on my server?
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