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buffermem file is also closely related to the operation of the
virtual memory VM subsystem of the Linux kernel. The value in
this file /proc/sys/vm/buffermem controls how much memory should
be used for buffer memory in percentage. It is important to note
that the percentage is calculated as a percentage of total
system memory. The default setup for the buffermem parameters
under Red Hat Linux is: "2 10 60" [root@deep] /# echo "70 10 60"
>/proc/sys/vm/buffermem # Improve virtual memory performance
vm.buffermem = 70 10 60 [root@deep] /# /etc/rc.d/init.d/network
restart Setting network parameters [ OK ] Bringing up interface
lo [ OK ] Bringing up interface eth0 [ OK ] Bringing up
interface eth1 [ OK ]According to the
/usr/src/linux/Documentation/sysctl/vm.txt file, the first
parameter 80 % means to use a minimum of 80 percent of memory
for the buffer cache; the minimum percentage of memory th