1. SSH into your server as root. 2. Run top. 3. Press shift + m. 4. Note the highest RES memory used by httpd. 5. Hit Q to exit top. 6. Execute: service httpd stop 7. Once httpd is stopped, execute: free -m 8. Note the memory listed under "used". 9. Find the guaranteed memory for your VPS plan. Support can tell you how much you have guaranteed if you cannot find it. 10. Subtract the … [Read more...]