Slow When Open Product

Hi,
I install dolibarr since version 2.x.x and upgarde frequently and now I’m using 5.0.6. I using centos 7, apache, mariadb, php 5.6.x. I just wondering sometimes when I open one product or proposal it took me about 3 minutes to open and it get an error from that. I wonder why it happen I tune the server. I already using the tips from https://wiki.dolibarr.org/index.php/FAQ_Increase_Performance
But no luck. FYI my product is not much it’s like only 600-700. Anybody can help?
Thanks a lot

Anyone can help me on this? Thanks a lot

unless you provide login and access to your dolibarr we can’t independently check out the speed.

FYI, I had the same problem a few months ago (on shared hosting) and then I got my own VPS and it was sorted. My problem was the shared hosting.