Optimizing Apache Memory Usage | Mpm prefork settings

This 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 raw.githubusercontent.com/ric... | 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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[@DDBAA24]

Dude , you dialed back from this , I guess to reach a larger audience but a technical video like this is great to see. I started watching you regular after 'Drunk Arch Install' so I never saw this. The audience you have now wouldn't be with this , like you said your doing entry level pushing for the adoption of linux. Personally I think you should start doing some videos like this one for more advanced/technical users every once and a while.

[@vrnchndk]

Thanks for the video. Any way how to know which module is actively in use by apache, so that rest of them can be disabled ?

[@ganztv3106]

Hi..great video..very helpful..keep it up.THanks..anyway do you know where to edit this using Dockerfile?or where to place the configurations inside docker? we are using Wordpress in Azure.THanks

[@madhukarkamble3520]

I need to know apache server optimization for large scale application where worker threads are working. So that willl be helpful for us. Thanks

[@laurensjvg]

Thx very usefull

[@sebsefyu]

Chris, you said you would do a video no optimizing Apache modules for minimum memory usage. Not sure you released it yet?

[@jameskennedyjkwireless1509]

How would I apply optimizing to CentOS 7 ?

[@GameBully2K]

hey there i have 2vcpus and 1Gb what do you suggest?

[@arkofimagination]

Why can't I find apache2 folder in the folder etc? Is it because I don't install LAMP in my f-1 micro VM?

[@clementmuhirwa]

I have a server with 16cores cpu, 32gb ram, apache is only using 3gb RAM and when only 1000 users accesses the web apache automatically shuts itself down, I watched this video multiple times but I can't get how to increase apache memory at least from 3gb to 20gb something like that. anyone who might know the answer? thank you.

[@benbeno893]

Does it makes any difference if one have workers module on micro instance running instead of prefork?

[@ChrisTitusTech]

I believe so, workers module is meant for high traffic sites, so I imagine using it instead of the prefork would lead to performance issues.

[@benbeno893]

@@ChrisTitusTech I don't quite get it. What would be the cause of this issues? I mean, if it is suitable for high traffic, why it would not perfom well with less trafic?

[@ChrisTitusTech]

@@benbeno893 The overhead for workers is higher to maintain than prefork. So you need a beefy system to see the benefit. A micro instance is just a shared single CPU with half a gig of ram... That thing can maybe hold 5-10 concurrent users.

[@benbeno893]

@@ChrisTitusTech Yep. I just calculated 8,5 for MaxClients

[@benbeno893]

@@ChrisTitusTech prefork is running 66 sec. in stead of 76 for my 450 requests. Anyway, thank you for video and explanation. Cheers

[@sunil951]

MPM Event it best !!

[@GreenHatHackers]

Please try to use bigger fonts it sucks when watching your video on phone