Reason/components behind high memory utilisation on linux

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http://www.unix.com – Hi friends, Problem: High memory utilisation of one linux server, due to which a database crashed on the server. My question to all: How does glance calculate that memory utilisation on the linux server is 98%. I mean what components are part of (31.4gb-599mb)? How can i check that myself? Can you please guid me the commands/steps by which i can do that. I want to understand what is taking so much memory and why. Below is the glance (memory) command output and few other command outputs for your reference Code: GSTOMS2 /oravl01/oracle> uname -a Linux indlin706 2.6.18-238.1.1.el5 #1 (HowTos)