Hi All,<br><br>My CentOS 5.0 is running on x86 machine with 4GB RAM. It runs as a webserver and there is a small java applet application.<br><br>When the system is fresh reboot, there is below 1GB of used memory and as times go , the used memory increased to over 
3.5GB.<br><br>Is there a way to free memory out like those program which works under Windows?<br><br><br>Thank you.<br clear="all"><br>