Why are httpd worker processes being recycled?

Solution Verified - Updated -

Issue

  • There are 5 child processes each with 27 threads:
    Thread Data [ ThreadTotal:PID:Argument ]
            1:20876:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:26740:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:26777:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:27139:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:27173:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:27175:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
    
  • A minute later there are 2 child process, both new, each with 27 threads:
    Thread Data [ ThreadTotal:PID:Argument ]
            27:324:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            27:380:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
            1:20876:httpd.worker:-d:/opt/apache/ibm/apps/ppresto-50833
    
  • The 5 processes are recycled and 2 new ones created.

Environment

  • httpd 2.2.x
  • worker mpm

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