Panel blew up CPU usage and load

[caomhan]

Hi there,

i had a problem with Plesk Control Panel (12.5.30 Update #20) on my Debian machine.
Processes like

/usr/bin/sw-engine -c /opt/psa/admin/conf/php.ini -f /opt/psa/admin/plib/scripts/interface_async_executor.php -- EventListener /opt/psa/admin/plib/.../...php handleEvent

lets CPU come to full usage und a load average of 80. Never noticed that before. What could the reason be?

Check the screenshot attached.

Regards,
Kevin

 

[IgorG]

I'd suggest you check commands for different events in your Event Manager.
BTW, you can manage execution priority of these commands/scripts there.

 

[caomhan]

Found in /var/log/plesk/panel.log that there are many MySQL connection errors like this:

[2016-02-03 11:25:17] ERR [panel] SQLSTATE[08004] [1040] Too many connections:

But normally the connections are quite low on my server.
Had a really wrong parameter in my.cnf for thread_cache_size setted (64M) - why "M"?

Didn't knew i have changed this parameter. Strange...

 

[caomhan]

I have no Evenets in Event Manager. Will have an eye on this. Maybe caused by the misconfigured my.cnf setting of thread_cache_size.

 

[spaceout]

A similar thing happened to me this morning. When I checked /var/log/plesk/panel.log I saw that the panel log was blown up with failed login attempts. I blocked the IP address at the firewall and everything was fine after that.