sleep() silently hogs cpu


i'm controlling apache linux within vmware.



one php pages i'm requesting does sleep(), i i try ask second page while initial page sleep()'ing, second page hangs, sharp sleep() initial page finish.



has anyone else seen behaviour?



i know php isn't multi-threaded, nonetheless seems sum mishandling cpu.



edit: i should've mentioned cpu use doesn't spike. i meant cpu "hogging" php page seems means cpu while page sleep()'ing.



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