Trying to diagnose bottleneck for apache

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http://serverfault.com – I am trying to diagnose bottleneck for a apache(v 2.0.52) server using strace. It looks like call to poll is slowing the process. Below is one example poll([{fd=10, events=POLLIN}], 1, 120000) = 0 <119.996719> ls -l /proc/pid/fd returns 10 -> socket:[somenumber] Any clues? Thanks (HowTos)