Issue Apache Memory Usage Increasing

[bkhayes]

Having an issue where my server's Apache memory usage keeps exceeding 20%. I restart once the warning hits but it keeps rising. What could the potential issue be?

I have 5 Wordpress sites running on it. Only 1 of which has moderate traffic. All other health reporting seems fine. All instances of Wordpress are running PHP 7.2.5 as FastCGI application. Memory limit 128mb.

 

[Brujo]

Which Plesk Version do you have ?
can you check if you have in the php settings on the domains & Serviceplan for the domains in the
PHP-FPM settings section the pm value other than ondemand

 

[Bitpalast]

To me the chart looks o.k. Does the memory usage increase beyond 1.6 GB at any time?

 

[bkhayes]

It has gone above 1.6 GB.

 

[bkhayes]

Which Plesk Version do you have ?
can you check if you have in the php settings on the domains & Serviceplan for the domains in the
PHP-FPM settings section the pm value other than ondemand

Plesk Version 17.8.11 Update #8

Only PHP Handler enabled is 7.2.6 FPM application

All others disabled:



And the settings under each website:


Only thing worth mentioning that I've really "customized" is the Apache directives. I've got page speed module filters running for each site. Could that impact this?

 

[Bitpalast]

I've got page speed module filters running for each site. Could that impact this?

Yes, sure. But you can easily test if this is causing a much higher load by temporarily disabling the module (not the settings).

In general, it is o.k. for Apache to use much RAM if the RAM is available. It is supposed to do that. On your system, Apache is currently only using 20% of RAM, so you still have plenty of headroom left. The curve it is showing in the chart is o.k., too.

 

[bkhayes]

Thank you for your response. The high RAM usage went down after a bit. If I continue to see spikes or increased usage I will try disabling the module temporarily. Thank you again!

 

[Hayden Ingham]

Hi there, I also have an issue with increasing Apache Memory Usage. As you can see by the screenshot they is a significant spike in usage. I have checked all PHP-FPM settings and they are all set to ondemend. Any ideas what could be causing this?

 

[Hayden Ingham]

Update: it has now dropped to below 20% and there is now not a warning. Weird...

 

[bkhayes]

I ended up switching to running on NGINX instead of Apache and that helped bring it down consistently.