Linux Memory problem :/

[kret]

Hello

I have big problem with my dedicated server. I have 4gb of ram and intel quadcore 4x2,4ghz . When i restart whole dedic i have ~3,6gb free its ok.... but when i run ots and ~300 players log in i have ~1,6gb free memory but ~3hours later

21:22 Uptime: 3 hours and 35 minutes.

i have only 1,3gb free and there is ~270 players logged in. after 10-15 hours server have only ~120-140 free memory and its lagged. Something is fucked up cause on windows server 2003 i had less memory usage :\ How to fix this ?

EDIT:
MY OS: UBUNTU 8.04 and theforgottenserver take 50% of RAM :/

Sorry4NewbieEnglish

 

[kret]

Please help

 

[Pietia]

i already send on gg how to do that ;p