Site performance, Server errors, outages and tunings

[Like Ra]

And now it does not ;-D

[Like Ra]

Unbelievable ... If it was what I think it was ...

"Block Top Spammers" plugin and huge ACL in .htaccess ... But I need to test more...

[Like Ra]

Aaaaaaaand I'm wrong again!!!

Suddenly the load jumps from 1 to 40 or something. Lots of php and httpd processes ...

[Like Ra]

No correlations left. The server dies for no reason, not it's alive for no reason.

[Like Ra]

Decreased the lifetime of the related daemons, disabled not important extensions, upgraded WordPress to the next RC2. Checked the queries - nothing strange there.

[Like Ra]

My last version is - one post with almost 100 images in it. Deleted a half. Let's see...

[Like Ra]

As soon as I deleted 3/4 ofthe pictures, the load jumped to 16. No, think harder ...

[Like Ra]

I'm not the only one, but it does not help: http://wordpress.org/support/topic/load-...-any-ideas

[Like Ra]

I think I understand what's going on (ha-ha, yes, again 😉 ). Burst load -> chain reaction. Several simultaneous requests + cron starts a java application (disabled now) + exim spawns spamassassin (disabled and forwarded) what leads to a burst memory requirement. No memory -> SWAP -> disk overload.

[Like Ra]

And this is a disadvantage of VPS. Shared servers are more suitable for burst loads (not simultaneous, of course 😉