How can I change from prefork to worker MPM on CentOS 64bit?
57,530
Solution 1
Edit: /etc/sysconfig/httpd
Uncomment:
HTTPD=/usr/sbin/httpd.worker
Restart, voila!
Solution 2
CentOS 6x:
modify file: /etc/sysconfig/httpd
HTTPD=/usr/sbin/httpd.worker
CentOS 7x:
$ cat /etc/httpd/conf.modules.d/00-mpm.conf
#LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
LoadModule mpm_worker_module modules/mod_mpm_worker.so
#LoadModule mpm_event_module modules/mod_mpm_event.so
Restart
Solution 3
Edited: /etc/sysconfig/httpd
And uncommented:
HTTPD=/usr/sbin/httpd.worker
After restarting httpd (service httpd restart) I get the following error:
Stopping httpd: [ OK ]
Starting httpd: httpd.worker: Syntax error on line 222 of /etc/httpd/conf/httpd.conf: Syntax error on line 9 of /etc/httpd/conf.d/php.conf: Cannot load /etc/httpd/modules/libphp5-zts.so into server: /etc/httpd/modules/libphp5-zts.so: cannot open shared object file: No such file or directory
[FAILED]
You might need to install php-zts though.
yum install php-zts
After that no more error messages and httpd is starting normally with module worker active.
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Author by
Andrew Fashion
Updated on September 17, 2022Comments
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Andrew Fashion almost 2 years
I'm running CentOS 64 bit, and just found out I am running prefork MPM on my dual quad Xeon. I was told worker will give me lower memory usage and higher performance, since I run a very high traffic website.
If this is true, how do I do it?
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ericn over 11 yearsHi @RafiqManiar, by restart do you mean Apache or the whole server here?
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YumYumYum about 9 yearsCentOS 7. i am getting this: /usr/sbin/apachectl: line 137: /usr/sbin/httpd.worker: No such file or directory
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Vladimir Kornea over 6 yearsFrom the file /etc/sysconfig/httpd for apache 2.4 # Note: With previous versions of httpd, the MPM could be changed by # editing an "HTTPD" variable here. With the current version, that # variable is now ignored. The MPM is a loadable module, and the # choice of MPM can be changed by editing the configuration file # /etc/httpd/conf.modules.d/00-mpm.conf.