We have a Wordpress website running on a VPS.
The site receives about 15k unique visitors a day. We use W3 total cache to cache our site.
The wordpress website runs fine but the memory of the server is filled within a period of 2 - 4 hours after which the server becomes unresponsive and has to be restarted.
We need someone to figure out why this is happening and what we can do about it.
Probably someone with extensive Wordpress / Webhosting / Apache experience.