Determine whether apache works in prefork or worker mode.

Common working modes of apache include prefork and worker. Run the httpd-l or apache2-l command. If the output result contains prefork. c, the prefork mode is used. If the result contains worker. c, the worker mode is used.

Now that we know the pattern, we can edit it in the apache confextrahttpd-mpm.conf.

The code is as follows:

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# # Server-Pool Management (MPM specific) # # # PidFile: The file in which the server shoshould record its process # Identification number when it starts. # # Note that this is the default PidFile for most MPMs. # <IfModule! Mpm_netware_module> PidFile "logs/httpd. pid" </IfModule> # # The accept serialization lock file must be stored on a local disk. # <IfModule! Mpm_winnt_module> <IfModule! Mpm_netware_module> LockFile "logs/accept. lock" </IfModule> </IfModule> # # Only one of the below sections will be relevant on your # Installed httpd. Use "apachectl-l" to find out # Active mpm. # # Prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # Worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_worker_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> # BeOS MPM # StartThreads: how many threads do we initially spawn? # MaxClients: max number of threads we can have (1 thread = 1 client) # MaxRequestsPerThread: maximum number of requests each thread will process <IfModule mpm_beos_module> StartThreads 10 MaxClients 50 # MaxRequestsPerThread 10000 </IfModule> # NetWare MPM # ThreadStackSize: Stack size allocated for each worker thread # StartThreads: Number of worker threads launched at server startup # MinSpareThreads: Minimum number of idle threads, to handle request spikes # MaxSpareThreads: Maximum number of idle threads # MaxThreads: Maximum number of worker threads alive at the same time # MaxRequestsPerChild: Maximum number of requests a thread serves. It is # Recommended that the default value of 0 be set for this # Directive on NetWare. This will allow the thread # Continue to service requests indefinitely. <IfModule mpm_netware_module> ThreadStackSize 65536 StartThreads 250 MinSpareThreads 25 Maxsparethread S 250 MaxThreads 1000 MaxRequestsPerChild 0 Maxapsaradb for memfree 100 </IfModule> # OS/2 MPM # StartServers: Number of server processes to maintain # MinSpareThreads: Minimum number of idle threads per process, # To handle request spikes # MaxSpareThreads: Maximum number of idle threads per process # MaxRequestsPerChild: Maximum number of connections per server process <IfModule mpm_mpmt_os2_module> StartServers 2 MinSpareThreads 5 MaxSpareThreads 10 MaxRequestsPerChild 0 </IfModule> # WinNT MPM # ThreadsPerChild: constant number of worker threads in the server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_winnt_module> ThreadsPerChild 150 MaxRequestsPerChild 0 </IfModule>

In windows, we usually use the final winnt mpm.