On 10/02/2013 10:10 AM, Mark J. wrote:
On Tue, Oct 01, 2013 at 04:37:52PM -0700, Kir Kolyshkin wrote:
I'd suggest you to reproduce the bug on 081.3 kernel booted for real,
and if you succeed, file a kernel bug to bugzilla.openvz.org.
Will put in the request to try and get one upgraded (or next node build on the
new kernel)
Also, it would be helpful to see output of pstree or ps axf inside a
container.
Note that you have specified oom adjustment for mysqld processes
which parent is init. I guess that OOM killer kills a mysqld process
which parent is not init, so oom adj is not applied.
ps axf:
<...skipped...>
15195 ? S 0:00 /bin/sh /usr/bin/mysqld_safe
--datadir=/var/lib/mysql --pid-file=/var/lib/mysql/server.noticias365.net.pid
31661 ? Sl 1:43 \_ /usr/sbin/mysqld --basedir=/usr
--datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql
--log-error=/var/log/mysql.error.log --open-files-limit=8192
--pid-file=/var/lib/mysql/server.noticias365.net.pid --socket=/tmp/mysql.sock
--port=3306
As you can see, mysqld parent is not "init" as it is set in config file,
but "mysqld_safe", therefore the rule is not applicable.
Generally speaking, I think you are doing something wrong here.
First, mysqld is a service which controls its own memory consumption
pretty well, you just need to set a few parameters in its /etc/my.cnf,
and that would be the preferred way of managing it.
These do have tweaked my.cnf files for cPanel.
Second, OOM should not happen in general. In case you are using
vswap, the sum of ram and swap configured for all containers
should not exceed real ram and swap on the system. Worst case
scenario is swap will be used heavily, resulting in a slowdown
(which is still way better than killing processes). In case you are
not using VSwap -- well, you should, see http://openvz.org/VSwap.
These are vswap enabled VM's and the nodes do have the /proc/vz/vswap file. If
I need to tweak the conf files more thats not a problem.
Well, the question is if CT config is VSwap or not.
Please show CT config file.
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