If you noticed the past weeks the speed of the server went down a bit, which was bugging me a lot. I am running Plesk 10 here and it is really annoying at times. Plesk is using its own system for everything and ofc it changes from version to version, which means it is often more luck than anything if you get things running right away. But I dared anyhow!
The past week I noticed errors and sometimes stalling performance of my PHP-applications. After some research I realized that the error might be related to some Linux distributions using only a small shared memory size which might cause APC to malfunction.