Did you change your website to Wordpress ??
Too many caches that use RAM could create more of a problem than it solves. It depends on how much RAM is available and free on your server. If your RAM becomes so full that you're using virtual memory, then things will only get slower, much slower.I'm using w3 total cache with redis integration(memory cache) that cache, "object cache", "database cache" and "page cache" never had problem with that...
There's probably heavy traffic trying to make use of the website while it is up, after having been down for so many days. Even after you get everything running perfectly, it may still be slower than you'd like for a little while after coming back online.
Or it could be someone with a bot trying to download all the data, constantly trying to access the page for it to come back up again.
Maybe you're right, but I think the problem is the CPU(quad core) , I have 8 GB of ram and the server never use it all. That's very strange because previously I Setup the server with vestaCP (Apache as webserver and Nginx as reverse proxy + W3 Total cache redis as memory cache) same setup, and worked well, Now I installed the same webserver and proxy using a different control panel "Centos Web Panel" but not work anymore... too slow
I tried wp super cache as well but doesn't solve anything, I think memory cache is the only solution, because the traffic is too intense (about 100 pages per minute) disk cache can't take that traffic
Don't worry I really appreciate your help! I won't bother you... I'm sure i will find a solution
Or I could activate clouflare DDoS protection that filters bad traffic, I could also try to replace old theme with a lighter one
I'm uncertain that some of the changes you have attempted have been made active.
I almost always used w3 total cache with redis, during the last months, never had a problem with memory cache, the server ran smoothy, just now I having this problem. I don't know, it look like redis doesn't cache anything...
Yeah they keep going up and down, it doesn't help that every time they get back up, a ton of traffic jumps on and overloads the servers...... and gone
I think: technical problems...
Yeah i know, but if I don't put in maintenance mode I can't solve anything... The weird thing is that before november it worked smoothly ...
So, I was checking your RSS feed timing. In this way, you can get timing for raw data without worrying about images, css, template rendering, bandwidth, etc. It's just raw server response time. Before you went down, an RSS page loaded in about 2 seconds. Now it's 13 seconds (12.78s for time to first byte). What that most likely means is either your application is bootstrapping extra slow (not enough RAM and/or CPU) or your database calls are extra slow.
No, there are some missing files (404)that the server can't load. Still haven't solved this problem.
I simply block the third part CSS and JS that caused the server slowdown, and I installed redis too
