How to check if apache is using prefork or worker
11 hours ago · [Tue Oct 19 23:15:07.000842 2021] [core:notice] [pid 7091] AH00094: Command line: '/usr/sbin/apache2' [Tue Oct 19 23:15:09.913896 2021] [mpm_prefork:notice] [pid 7091] AH00171: Graceful restart requested, doing restart [Tue Oct 19 23:15:10.084091 2021] [:notice] [pid 7091] mod_ruid2/0.9.8 enabled [Tue Oct 19 23:15:10.088484 2021] [mpm_prefork ... Dec 14, 2012 · You can tell whether Apache is using preform or worker by issuing the following command. apache2ctl -l In the resulting output, look for mentions of prefork.c or worker.c
Like prefork, worker is also susceptible to overload caused by so-called keep-alive connections (see below). mpm_event: With event, the Apache HTTP server has had a third multi-processing module available for productive use since version 2.4.Jun 05, 2018 · Not suitable for use with non-thread-safe modules like mod_php. prefork: Utilizes multiple child processes, each with one thread. Each process handles one connection at a time. It’s faster than a worker but uses more memory. Suitable for debugging applications using non-thread-safe modules like mod_php. To check your MPM version, run command According to the survey from , the Apache HTTP Server (Apache) is the world's most widely-used Web server. Developed by the Apache Software Foundation (), it is available for most operating systems. SUSE® Linux Enterprise Server includes Apache version 2.4. In this chapter, learn how to install, configure and set up a Web server; how to use SSL, CGI, and additional modules; and how to ...When compiling on a *nix environment, the default value for Apache MPM is prefork, but you can specify it while compiling Apache with the following configuration directive -with-mpm=prefork or -with-mpm=worker How to find which MPM in use In order to find out what MPM apache has been configured with, you need to check "apachectl - l".
However, from the configuration of Apache you posted in the comments along with the fact that your VPS only provides 256 MB of memory, I see that a setting of. MaxClients 256 for the Prefork MPM is way too much for such a machine. On my Debian Squeeze webservers I see about 20MB usage per fork, so about 15 connections will already consume all ...Here are the steps to increase max connections in Apache. 1. Install MPM module. We need to install MPM Apache module to be able to serve lots of concurrent connections. You can use mpm_worker or mpm_event module for this, instead of mpm_prefork module which consumes a lot of memory.