We are running CentOS 6 with a PHP web application.
After we pushed a new version live it seems we have a memory issue, however top
does not show any high usage instances. I have looked around and people suggest checking out free
, to check if it is just being used by the cache. The result shows that it is being used up by processes other than cache.
I would like to know which direction to start looking in, and any suggestions if there are any.
Many Thanks - Matt