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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 50466] New: httpd process doesn't recycle
Date Mon, 13 Dec 2010 15:08:28 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=50466

           Summary: httpd process doesn't recycle
           Product: Apache httpd-2
           Version: 2.2.15
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: prefork
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: cheungtitus@hotmail.com


There appears to be an issue with Apache web server not being able to recycle
one of the httpd processes.  It appears to be stuck and consumed 100% CPU
power.  This is happening despite the following settings as appeared on my
phpinfo() page.
Max Requests     Per Child: 10000 - Keep Alive: on - Max Per Connection: 100 


To illustrate this, please look at PID 4188 from the following 2 "top" capture
over a span of 3 days.  Any additional details required please let me know. 
This is running on CentOS 5.5 64-bit 2.6.18-194.el5.


1 day later
top - 08:11:06 up 122 days, 11:05, 1 user, load average: 1.05, 1.04, 0.97
Tasks: 135 total, 3 running, 132 sleeping, 0 stopped, 0 zombie
Cpu0 : 5.7%us, 0.7%sy, 0.0%ni, 90.7%id, 1.7%wa, 0.7%hi, 0.7%si, 0.0%st
Cpu1 : 73.4%us, 26.6%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2059516k total, 1906896k used, 152620k free, 154016k buffers
Swap: 4095992k total, 80k used, 4095912k free, 1005564k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4188 daemon 25 0 115m 18m 2948 R 100.2 0.9 43:25.32 httpd
6602 daemon 15 0 109m 12m 2856 S 2.7 0.6 0:00.17 httpd
6678 daemon 15 0 105m 8416 2600 S 1.3 0.4 0:00.05 httpd



3 days later
top - 06:16:14 up 124 days,  9:10,  1 user,  load average: 1.03, 1.20, 1.18
Tasks: 128 total,   3 running, 125 sleeping,   0 stopped,   0 zombie
Cpu0  : 12.3%us,  1.3%sy,  0.0%ni, 85.3%id,  0.0%wa,  0.3%hi,  0.7%si,  0.0%st
Cpu1  : 73.8%us, 26.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   2059516k total,  1923432k used,   136084k free,   157940k buffers
Swap:  4095992k total,       80k used,  4095912k free,   986552k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 4188 daemon    25   0  115m  18m 2948 R 99.9  0.9   2806:08 httpd
  645 daemon    15   0  108m  10m 2852 S  4.7  0.5   0:00.15 httpd
  550 daemon    15   0  109m  12m 2868 S  2.7  0.6   0:00.56 httpd
  632 daemon    15   0  108m  11m 2836 S  2.7  0.6   0:00.15 httpd
  633 daemon    15   0  109m  11m 2832 S  2.0  0.6   0:00.19 httpd
  647 daemon    16   0  106m 8860 2740 S  1.7  0.4   0:00.05 httpd
  476 daemon    16   0  108m  11m 2932 S  0.7  0.6   0:01.63 httpd

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