https://issues.apache.org/bugzilla/show_bug.cgi?id=52695
Bug #: 52695
Summary: mod_fcgid 2.3.7-dev crashes under heavy load
Product: Apache httpd-2
Version: 2.2.21
Platform: PC
OS/Version: Linux
Status: NEW
Severity: blocker
Priority: P2
Component: mod_fcgid
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
We're using mod_fcgid with Apache mpm_worker on a fairly busy server with 800+
vhosts. Under heavy load mod_fcgid stops working and only restart fixes the
problem.
In error_log we have:
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[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/aaaa/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/bbbb/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/bbbb/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/cccc/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/dddd/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
[Thu Feb 16 02:00:36 2012] [info] mod_fcgid: /fcgi/eeee/public_html/php-fcgi
total process count 700 >= 700, skip the spawn request
--- CUT ---
BUT 'ps aux' shows no php-cgi processes running and Apache status page shows 0
FastCGI processes running:
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Apache Server Status for 127.0.0.1
Server Version: Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8o
DAV/2 Apache mod_fcgid/2.3.7-dev
Server Built: Dec 13 2011 09:36:32
__________________________________________________________________
Current Time: Friday, 17-Feb-2012 01:25:42 CET
Restart Time: Friday, 17-Feb-2012 00:49:48 CET
Parent Server Generation: 1
Server uptime: 35 minutes 54 seconds
Total accesses: 20738 - Total Traffic: 320.9 MB
CPU Usage: u121.26 s2.07 cu0 cs0 - 5.73% CPU load
9.63 requests/sec - 152.5 kB/second - 15.8 kB/request
164 requests currently being processed, 136 idle workers
WWWWWWWWWWWW_WWWWWWWWWWW__W_W__WWWWWWWWWWW_W_WWWWW_WWWWWW_W_W_WW
WWWW_WWWWW_WWWWWWWWWWWWWWWWWW_WWWW_W_______________W__W__W_WW_WW
WW__WW_WW_W_WW_WWWW__W_WWWWW___WW_____WW_W_W___WW_______WWW_WW__
W_____W_W_________WW_W__W_W_WWWW_WW_W_W_WW__W_____W___WW___WW_WW
__WW__W_W_W_WW____W___W___WWW________W_W___WWWWW..WW.W....W..WWW
..W...W....WWW...W.WWW..W..WW.WWW.WW.W.....W..WW.W..W.WWWW.WWW..
.W....W.WW.W..W.................................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
[...]
mod_fcgid status:
Total FastCGI processes: 0
--- CUT ---
mod_fcgid configuration:
--- CUT ---
<IfModule mod_fcgid.c>
FcgidProcessTableFile /var/run/fcgid_shm
FcgidIPCDir /var/run/fastcgi/sock
FcgidIdleTimeout 10
FcgidIdleScanInterval 10
FcgidFixPathinfo 0
FcgidErrorScanInterval 3
FcgidZombieScanInterval 3
FcgidMaxProcesses 700
FcgidMaxRequestsPerProcess 500
FcgidMaxProcessesPerClass 600
FcgidMinProcessesPerClass 5
FcgidConnectTimeout 5
FcgidProcessLifeTime 3600
FcgidIOTimeout 60
FcgidPassHeader Authorization
FcgidMaxRequestInMem 65355000
FcgidMaxRequestLen 65355000
FcgidOutputBufferSize 2048000
</IfModule>
--- CUT ---
Every vhost has similar config:
--- CUT ---
<IfModule mod_fcgid.c>
FcgidMaxProcessesPerClass 6
FcgidMinProcessesPerClass 0
</IfModule>
--- CUT ---
mpm_worker config:
--- CUT ---
<IfModule mpm_worker_module>
StartServers 4
ServerLimit 400
MinSpareThreads 50
MaxSpareThreads 200
ThreadLimit 100
ThreadsPerChild 100
MaxClients 400
MaxRequestsPerChild 1000
ListenBackLog 810
</IfModule>
--- CUT ---
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