Thread:Project:Support desk/ Novice Caching Advice Needed!/reply (10)

was that from a slow loading page? that profiling output says total time taken was half a second.

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Re-reading your original post, I guess you never said that the pages were loading slowly, only that CPU usage was high, and I assumed that meant CPU was being spent loading pages.

Assuming that pages are loading quickly, could you check to see what is taking up all the processing time (Is it really mediawiki, or is it something else). On linux servers you can usually see what is taking up the most processing time by running the  command. And to clarify, this is high cpu usage on the server(s) running PHP, not the db servers? (If its the db servers that are overloaded, other things can be done, e.g. disabling hit counters to reduce writes for example)