Linux memory leak?
jlb17 at duke.edu
Thu Feb 28 12:42:09 PST 2002
On Thu, 28 Feb 2002 at 2:58pm, Josip Loncaric wrote
> # free
> total used free shared buffers
> Mem: 512444 449196 63248 0 70164
> -/+ buffers/cache: 302700 209744
> Swap: 1060272 285492 774780
> If I add up all RSS numbers reported by 'ps -e v' I get only about
> 20,500 KB, and yet this dual CPU system reports 302,700 KB RAM used
> (without even counting buffers or cache). Apparently, only 'reboot' can
> recover the missing 282,200 KB. Any ideas on tracking down where the
> missing memory went?
I've seen this behavior even after very little uptime. All you have to do
is have a process swap heavily. When that process goes away, it seems as
if what's left in swap also stays in memory. Further memory pressure
makes stuff then get paged *out* of swap.
I tracked it down to an existing bugzilla report:
There doesn't seem to be an official resolution from RedHat yet. But a
custom compiled 2.4.17 didn't show this behavior.
Department of Biomedical Engineering
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