VPS response time is extremely slowed down during traffic spike

Question

I have a 2 GB ram, 2 Ghz CPU, 1Gbit connection VPS. I have a news site which works on LAMP (Wordpress) which slowed down very much. According to Google Analytics we had +100 con curate connections and the server response time skyrocketed to +1 minute. I've checked my VPS controlpanel, but the ram consumption seems only to be around ~1.1GB. During the spike I've installed a cache plugin but It's still useless. I suppose I haven't configured the server properly, so I would kindly ask better configurations for a vps of this kind. If necessary I could scale up the server with better ram and cpu, but I see that's not the case here.

Here's the screenshot for my vps's statistics: http://i.imgur.com/ruLaT.png

Answer 1

That certainly isn't right at all. With the specs you have, your VPS should be able to handle 10x the traffic you are currently getting without any issues.

Take a look at the logs to see if anything is getting logged there that would indicate any issues.

I would also have a hardware health check run on the host node to rule out hardware issues.

If you have coded some of your own stuff, I would also check that in case of any errors / mem leaks.