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:
PID TTY STAT TIME COMMAND
1 ? Ss 0:00 init
2 ? S 0:00 [kthreadd/3679]
3 ? S 0:00 \_ [khelper/3679]
127 ? S<s 0:00 /sbin/udevd -d
481 ? Ss 0:00 /sbin/portreserve
523 ? Ss 0:00 nsd
525 ? S 0:00 \_ nsd
526 ? S 0:07 \_ nsd
1923 ? Ss 0:00 /usr/sbin/sshd
1930 ? Ss 0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
2647 ? Ss 0:01 /usr/sbin/exim -bd -q60m
2668 ? Ss 0:04 /usr/sbin/dovecot
2670 ? S 0:01 \_ dovecot-auth
2697 ? S 0:02 \_ pop3-login
2698 ? S 0:00 \_ pop3-login
2699 ? S 0:01 \_ imap-login
2700 ? S 0:02 \_ imap-login
2675 ? Ss 0:23 /usr/local/bin/spamd -d --allowed-ips=127.0.0.1
--pidfile=/var/run/spamd.pid --max-children=3 --max-spare=1
8921 ? S 0:12 \_ spamd child
2701 ? Ss 0:08 /usr/local/apache/bin/httpd -k start -DSSL
27690 ? S 0:00 \_ /usr/local/apache/bin/httpd -k start -DSSL
27691 ? S 0:00 \_ /usr/bin/perl /usr/local/cpanel/bin/leechprotect
27697 ? S 0:00 \_ /usr/local/apache/bin/httpd -k start -DSSL
27709 ? Sl 0:15 \_ /usr/local/apache/bin/httpd -k start -DSSL
31777 ? S 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
31881 ? S 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
31917 ? R 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
27774 ? Sl 0:15 \_ /usr/local/apache/bin/httpd -k start -DSSL
27801 ? Sl 0:16 \_ /usr/local/apache/bin/httpd -k start -DSSL
31308 ? Z 0:01 | \_ [php] <defunct>
31890 ? S 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
31911 ? R 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
27831 ? Sl 0:16 \_ /usr/local/apache/bin/httpd -k start -DSSL
31913 ? S 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
31915 ? R 0:00 | \_ /usr/bin/php
/home/noticias/public_html/wp-admin/admin-ajax.php
27858 ? Sl 0:16 \_ /usr/local/apache/bin/httpd -k start -DSSL
31898 ? S 0:00 | \_ /usr/bin/php
/home/noticias/public_html/index.php
28021 ? Sl 0:16 \_ /usr/local/apache/bin/httpd -k start -DSSL
31796 ? S 0:00 \_ /usr/bin/php
/home/noticias/public_html/index.php
31886 ? S 0:00 \_ /usr/bin/php
/home/noticias/public_html/index.php
2707 ? Ss 0:00 pure-ftpd (SERVER)
2709 ? S 0:00 /usr/sbin/pure-authd -s /var/run/ftpd.sock -r
/usr/sbin/pureauth
2716 ? Ss 0:00 crond
2726 ? Ss 0:00 /usr/sbin/atd
2896 ? S 0:00 cPhulkd - processor
2918 ? S 0:07 cpsrvd (SSL) - waiting for connections
2929 ? S 0:00 cpdavd - accepting connections on 2077 and 2078
2944 ? S 0:01 queueprocd - wait to process a task
2985 ? S 0:01 tailwatchd
3018 ? Ss 0:01 /usr/sbin/cf-execd
18794 ? Ssl 0:00 /usr/sbin/nslcd
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
32002 ? SN 0:00 cpanellogd - sleeping for logs
29446 ? S<L 0:08 /usr/bin/atop -a -w /var/log/atop/atop_20131002 60
31825 ? Ss 0:00 vzctl: pts/0
31826 pts/0 Ss 0:00 \_ -bash
31919 pts/0 R+ 0:00 \_ ps axf
> 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.
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