Site very slow, High TTFB, what happened?

yu0307

Registered
Aug 10, 2017
4
1
3
Mississippi
cPanel Access Level
Root Administrator
So I started to have this issue, Every page I load I notice there is a high TTFB (2-10s). Regardless if it's a brand new wordpress site or not. It seems that delay before first byte is always there.

I suspect it's a Mysql or caching issue, but I turned on cache on both mysql and apache(opCache). there is no improvements.

I'm running on Cent 7 with Cpanel 64. System is virtualized on VMware with 12 CPus and 64Gb memory. the Internet is fine, because i have another VM running on the same network and that webserver has no TTFB issue.

I notice even uploading through SSH is a bit slow.

Please help, or let me know how I can debug and find out the issue.

Thank you
 

yu0307

Registered
Aug 10, 2017
4
1
3
Mississippi
cPanel Access Level
Root Administrator
Hi, Thank you for your response, The reference did point out the issue.
- Cached sites are super fast.
-It's only slow when logged into wordpress and then visit the site.
suspecting it's a apache and Mysql Issue.
I read all the referencing site, the only suggestion is using litespeed which I don't want to do since it cost $2k to buy one with 8 cores. I'm going to try to upgrade to EA4 and PHP7 and see the result.
Any further suggestions?
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,241
363