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VDS Memory Optimization

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linux-howto

http://serverfault.com – I am new one for rent a server. I choose a CentOS VDS width 2G memory. After apache+mysql+php install and setting, My server cost 750MB and 1297MB free (I use free -m to see it) And then I run one page of mine (2 mysql fulltext union search, 4 jquery ajax process, 4 social plungin, one whether online api, header footer use php include), then use SSH free -m, I see the memory will increase into 835MB, one page cost 85MB memory... So that my site will support less only few custom at same time, else the VDS provider will punish a over memory used ... I also read some article from google, some (HowTos)