Is there a way to diagnose unexpected flushes of pagecache in RHEL 5?

Solution Unverified - Updated -


  • My system is building up pagecache during backups or other operations and then it is suddenly being flushed, causing performance problems.
  • What is causing the kernel to suddenly flush page cache?
  • My cluster node is experiencing sudden cache flushes which leads to increased CPU usage by glock_workqueue


  • Red Hat Enterprise Linux (RHEL) 5

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