we migrated to XF a couple of month ago and notice more and more performance issues over the last time.
We have 6 Mio. posts and 60k users. In the afternoon, around 1.500 people are online, that's when we have the most trouble. It takes minutes to load the site, sometimes the browser just shows a blank page.
This is our configuration right now:
Intel Xeon X3460, 4x 2,80GHz
12 GB DDR3 RAM, max. 32 RAM
4x 500 GB SATA 7.200 rpm (RAID10)
2x Intel Xeon E5620, 4x 2,40GHz
24 GB DDR3 RAM, max. 144GB
4x 147 GB SAS 15.000 rpm (RAID10)
The dynamic files are handled by an Apache 2.0 with php 184.108.40.206. Behind the Apache there is an NGINX proxy for all static files like JS, CSS, Images ...
In the phpinfo i can see that xcache (1.3.0) and memcache (3.0.4) is installed and loaded but since i'm not a pro in server configuration i'm not sure how they are setted up.
Maybe some of you can help me or give me some hints how to optimize my configuration. I think it has something to do how the Apache and NGINX are talking to each other.
Let me know if you have any other questions.
Thanks a lot so far