Hello guys. So when I click “next” inside a topic with 300+ replies, it usually takes more than 3+ seconds to load the destination page...

my website (a forum) is pretty smooth in general. 1-2 seconds for home page, sub-forums, topic list, club etc. so is the problem related to database (MySQL) rather than hardware ( cpu, ram, Apache  setting etc) ?

what do you think? Thanks!

Could be anything, from third party plugins to your hardware to your configuration. You should open a support ticket and rule out some things.

1 hour ago, Paul E. said:

Could be anything, from third party plugins to your hardware to your configuration. You should open a support ticket and rule out some things.

wow, thank you Paul! 

It's indeed a problem from a plugins after testing...😄