Optimizing Apache Memory Usage | Mpm prefork settings
221This video goes over optimizing apache memory usage by configuring mpm prefork module to optimal values for your server.
UPDATE: Run this curl command and it will just tell you what you should put
curl -sL https://raw.githubusercontent.com/richardforth/apache2buddy/master/apache2buddy.pl | perl
Commands used:
Check Apache Memory usage
ps -ylC apache2 --sort:rss | awk '{sum+=$8; ++n} END {print "Tot="sum"("n")";print "Avg="sum"/"n"="sum/n/1024"MB"}'
Launch Memory manager / resource viewer
'htop' OR you can use 'top' for less options and visuals
Values to calculate:
Total System Memory Free - Buffer / Apache2 MB usage = MaxRequestWorkers, ServerLimit, and MaxClients
My Settings in Video: Server Instance (Standard) 1 dedicated vCPU with 3.5 GB of Memory
# 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
# MaxRequestWorkers: maximum number of server processes allowed to start
# MaxConnectionsPerChild: maximum number of requests a server process serves
StartServers 3
MinSpareServers 5
MaxSpareServers 10
ServerLimit 45
MaxClients 45
MaxRequestWorkers 45
MaxConnectionsPerChild 2000
45 processes x 68 MB per = 3060 MB
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