I need an idea to solve overloading my server, my server specification:
vCPUs: 1 vCPU
Memory: 2 GB
System Drive: 40GB
OS:Linux Ubuntu 10.04 64 bit
Software: Apache, PHP, MySQL, and Plesk 11
I check the server using command htop, showing me 1900MB of 2000MB usage and swap 1600MB of 3000MB. When that happens, all my domains (about 30) are not loading and I can't do anything. To solve this I always have to restart the machine.
Processes looks OK, nothing wrong, few MySQL and psa (Plesk).
On server I've got 10 WordPress and about 3 other CMS websites.
Do I really need more RAM or maybe another VPS?
Please help me to choose...