I admin Wordpress site with 120k Facebook fans. Site has 750,000 pageviews/month according to GA.
When the owner shares something on site's FB fan page, my 4GB RAM VPS is immediately out of RAM and I see error 500 (service unavailable). 99% of time it 4GB sufficiently enough. This is known as Slashdot effect.
Is there any webhosting service which solves this problem. I don't want the name of specific webhosting company, I want to know what kind of hosting service or solution I should google out.
Does anybody from you experience with this? How did you solved this?