500 users online 200% overload cpu?

[EssexBS]

Hello,

We got a community over 3 years that uses Full IPB suite. (url: http://indungi.ro full IPB suite)

In last months after our board got over 500 users online (in past 15 minutes) our processor is 200% overloaded? (our entire board is stuck)

300 users online - works fine

Time Now: Mar 18 2013 03:56 PM Last Visit: Today, 02:30 PM Exec. Time: 1.3104 Load: -- Queries: 12 queries Gzip: GZIP Disabled

Processor: 20% load

500 users online - board got stuck

Time Now: Mar 17 2013 08:56 PM Last Visit: Today, 08:30 AM Exec. Time: 3.2203 Load: -- Queries: 12 queries Gzip: GZIP Disabled

Processor: 200% overload (IPB got stuck)

Server spec:

i7 8 x core

16 GRAM

Linux

Our problems seems to be at PHP part.

[Benjamin.]

Make sure your running all the limits that IPB Needs to run. Also try to update apache. Sometimes things can just go crazy..

[EssexBS]

Hello, we have 3 times more resources that IPB needs to run, as you can see is still not running ...

Versions:

Apache 2.4 + PHP FPM 10 child + i7 2600 k / 3.5 ghz

APC url http://www.indungi.ro/apc.php

403 users online

Time Now: Mar 18 2013 07:26 PM Last Visit: Today, 05:45 PM Exec. Time: 1.8560 Load: -- Queries: 12 queries Gzip: GZIP Disabled

[Grumpy]

Hello, we have 3 times more resources that IPB needs to run, as you can see is still not running ...

We don't really know that. Post all the stats from top

[Luis Manson]

maybe you should check also in mysql "show processlist" im not very knowledable at this, but in my case some times when a heavy query is running apache/php gets stuck with some SQL locks and load goes up for some time

my server was also an i7 with 6Gb ram - nginx/fpm/mysql/mail with the load <3 and near 1K users online, it had 3 to 5 load spikes a day which im still unable to track down, right now i had moved web/php to an i3 and also its stable, but SQL still on the i7