free -m
does not seems to include memory used by RAM disks (tmpfs filesystems). Maybe because it's something in the kernel space?
How do I get the real memory usage (or it's opposite, free memory) including the allocated space of filesystems that reside in RAM like tmpfs
?
I currently check for the memory usage by running df -h
and adding the "In use" numbers to the -/+ buffers/cache
number. Is there a command available that gives me the real memory usage?
free -m; cat /proc/meminfo; swapon -s; mount
(while you have that tmpfs you mention)df -h
-- Darn, I just noticed that this question is old, sorry.free -m;cat /proc/meminfo>1; dd if=/dev/zero of=/tmp/big bs=1M count=400; free -m;cat /proc/meminfo>2;diff -u 1 2
(assuming that/tmp
is mounted as tmpfs and has at least 400MiB memory available)