Extremly high server load

[First-Dragon]

As soon as i restore the site on my VPS server load start to get high until it reach 200 and server crashes. It is a WordPress based site with around 4K visitors daily, VPS is very good, with 6 cpu cores and 2gb ram so it shouldn't be a problem for this traffic. I have a screen of top command:

http://gyazo.com/68440ddc5c69ba3d73dd89791178d78c

As you can see the number of tasks is around 100 on this image and that number is getting higher and higher until it reaches around 500 and then server fail. Can anyone please help with this, what can cause this extreme load.

Thank you.

First-Dragon Reviewed by First-Dragon on 5th Sep 2012. Extremly high server load As soon as i restore the site on my VPS server load start to get high until it reach 200 and server crashes. It is a WordPress based site with around 4K visitors daily, VPS is very good, with 6 cpu cores and 2gb ram so it shouldn't be a problem for this traffic. I have a screen of top command: http://gyazo.com/68440ddc5c69ba3d73dd89791178d78cAs you can see the number of tasks is around 100 on this image and that number is getting higher and higher until it reaches around 500 and then server Rating: 5

[onel0ve]

Any attack ? And looks like your mysql nt well optimized . Which webserver are you using ? php version ? any op code cache ?

[First-Dragon]

No attacks, I've tested and restored another site and no high load on server at all, so it is not something on the server that is causing this, it must be something in the site, maybe some plugin or i don't know, something that can cause load.

Server Version: Apache/2.2.22 (Unix) mod_ssl/2.2.22 OpenSSL/1.0.0-fips mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635

PHP Version 5.3.16 , and no opcode cache installed i think.

[cvrle77]

remove ALL plugins, by renaming plugin folder to old_Plugins, and creating new Plugins folder.
Then add plugins one by one, to see which one is causing issues.

[onel0ve]

If you have any visitor status , wprobot type or any other rss feed grabber plugin then you can face trouble . And also install any cache plugin . Varnish is the best solution for a wordpress blog .

[First-Dragon]

Thank you both for help, i will update on results.

[Gevin]

Why dont you try nGinx? i suggest you try it.

[First-Dragon]

Ok i tried changing plugins folder name, but deactivating all plugins didn't worked. This is very weird situation, i mean from the momenth i restore the site server goes on 200 load in a minute and number of processes goes to 400 and more.

http://rapidimg.org/images/XHbU.png

[onel0ve]

Ok i tried changing plugins folder name, but deactivating all plugins didn't worked. This is very weird situation, i mean from the momenth i restore the site server goes on 200 load in a minute and number of processes goes to 400 and more.

http://rapidimg.org/images/XHbU.png

A proper server optimization may can reduce you load . As you said you have 4k/day visitor its nt so much . We host upto 8k/day visitor in our shared server with low load , so if you optimized your server then you will nt face any high load problem.

[SeeksSteven]

MySQL/Apache configs could probably use some proper optimization; however, sounds like there's some funky going on with the site. Hard to help based on whats provided though.