php-fpm 7.1 pm.max_children config

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bigalow

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#245585 11-Feb-2019 23:32

starting a new sever and im using php-fpm 7.1

keep getting warning like this

WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 0 idle, and 9 total children

i change my default www.conf to below but still getting warnings

my setting are

pm = dynamic

pm.max_children = 17

pm.start_servers = 2

pm.min_spare_servers = 1

pm.max_spare_servers = 3

pm.process_idle_timeout = 10s;

pm.max_requests = 1000

server has 1 core cpu and 2gb ram running Ubuntu 18 with Apache

any tips ?

michaelmurfy

meow
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#2176821 11-Feb-2019 23:58

What is this server hosting? It can be hard to balance this depending on how much ram each process uses. Really, it is trial and error. For a site that achieves ~3mil hits per day (running PHP-FPM, Apache with a seperate database server) I have this:

pm = dynamic
pm.max_children = 50
pm.start_servers = 20
pm.min_spare_servers = 10
pm.max_spare_servers = 35
pm.max_requests = 1000

The server has 2x Virtual CPU cores and 4gb of ram with NVME backed storage (I also have 4gb allocated to SWAP) and the site it hosts runs quickly. This is what works for me, but it may not work for you.

Michael Murphy | https://murfy.nz
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bigalow

568 posts

Ultimate Geek
+1 received by user: 112

#2176824 12-Feb-2019 01:08

vultr vps im using with 1 core

forgot to post i have a 2gb swap too and MySQL on another server

ill test with about half of what you got

pm = dynamic
pm.max_children = 25
pm.start_servers = 10
pm.min_spare_servers = 5
pm.max_spare_servers = 16
pm.max_requests = 1000

what do you use in mpm_event.conf ?? on Apache ?

mine is keep as default settings