PHP application overload

Very unlikely.

Are you using caching?

Yes… W3TC

What is the difference when you disable Ad inserter?

Ad inserter is called only when WP needs to create a page. If cached page is served, Ad inserter is not called.

Have you isolated the problem?

Not yet… I am investigating further.

Hi,

I’ve isolated the problem and Ad Inserter is in fact causing CPU spikes in my server when the traffic increases.

I don’t know if W3 Total Cache is handling correctly this problem.

Can you help?

I’ll be happy to help.

Are you using the latest version of the plugin 1.5.5?
There were some changes since the last version.

Yes, using version 1.5.5 ??

Ok, then please contact me via the link in the plugin.