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Materix
Joined: 30 Aug 2012
Posts: 42
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 Posted: Tue 23 Mar '21 21:53 Post subject: Memory vs CPU |
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I have an Apache 2.4 with PHP on a Windows 2016-server, and there is a lot of traffic.
Therefore the CPU runs close to 100%, while only 4GB of 12GB is being used.
How can I move more of the load from the CPU over to the memory? |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Tue 23 Mar '21 23:46 Post subject: |
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Well the CPU is doing the work. More RAM can't compensate that.
Do you use PHP as module or over fcgid? |
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Materix
Joined: 30 Aug 2012
Posts: 42
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| Posted: Tue 23 Mar '21 23:47 Post subject: |
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Thanks for the reply.
It runs as fcgid. |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Tue 23 Mar '21 23:52 Post subject: |
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Then you can only have a second server and a load balancer OR more CPU cores.
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Apache Load Balancer <--------> Apache 1 with fcgid PHP
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---------> Apache 2 with fcgid PHP
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Materix
Joined: 30 Aug 2012
Posts: 42
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| Posted: Wed 24 Mar '21 0:22 Post subject: |
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Thanks!
I will look into that. |
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Jan-E
Joined: 09 Mar 2012
Posts: 1266
Location: Amsterdam, NL, EU
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| Posted: Thu 25 Mar '21 15:35 Post subject: |
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| Curious: which PHP version are you using? Is the OPCache module loaded? |
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Materix
Joined: 30 Aug 2012
Posts: 42
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| Posted: Thu 25 Mar '21 15:54 Post subject: |
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| It is PHP 5.6.40 and no OPCache. Does OPCache help? |
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Jan-E
Joined: 09 Mar 2012
Posts: 1266
Location: Amsterdam, NL, EU
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| Posted: Thu 25 Mar '21 16:16 Post subject: |
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OPcache is tricky. I had it working for a Drupal 7 site for a long time with PHP 5.6 as mod_fcgid. In theory it should work.
Are you running the 64-bits or the 32-bits version of PHP 5.6.40?
Ever thought of upgrading to PHP 7 (7.4)? That version is quite mature now and faster than PHP 5.6. |
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Materix
Joined: 30 Aug 2012
Posts: 42
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| Posted: Thu 25 Mar '21 20:10 Post subject: |
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Thanks for the reply!
64-bit version of PHP.
It is a legacy application, so PHP 7/8 is not currently an option. |
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