Why "pdflush" process is utilizing CPU?

Solution Verified - Updated -

Issue

  • pdflush process is utilizing high CPU on system.
top - 15:51:48 up 15 days, 15:46,  1 user,  load average: 1.74, 1.90, 1.73
Tasks: 227 total,   1 running, 226 sleeping,   0 stopped,   0 zombie
Cpu(s):  4.2%us, 10.0%sy,  0.0%ni, 85.3%id,  0.3%wa,  0.1%hi,  0.1%si,  0.0%st
Mem:  16436100k total, 15659240k used,   776860k free,  1003280k buffers
Swap:  2097144k total,     6568k used,  2090576k free,  9362232k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  421 root      16   0     0    0    0 S 32.2  0.0   2813:14 pdflush

Environment

  • Red Hat Enterprise Linux 5

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