On 01/03/2012 02:57 PM, Pádraig Brady wrote:
Just a comment on the accuracy of the numbers. # ps_mem.py¹ | grep tracker 3.2 MiB + 730.5 KiB = 3.9 MiB tracker-miner-fs 3.9 MiB + 722.5 KiB = 4.6 MiB tracker-miner-flickr 5.5 MiB + 549.0 KiB = 6.0 MiB tracker-store
One of simple, yet least ambiguous methods of determining how many pages is REALLY used only by a process is to nuke it in a mostly quiescent system, and compare MemFree just before that and just after that: # cat /proc/meminfo >/tmp/1; killall tracker-store; sleep 1; cat /proc/meminfo >/tmp/2; cat /tmp/1 /tmp/2 | grep MemFree MemFree: 1940372 kB MemFree: 1963860 kB As you see, killing it on my machine freed over 23 megs worth of pages. Note that any shared pages (such as glibc) are not freed this way; also, non-mapped pages (such as large, but unused malloced space, or large, but unused file mappings) also do not contribute to MemFree increase. IOW: this method does not give artificially inflated numbers. IOW: I do not think I overestimated memory consumption in my original post. If anything, I probably underestimated it. I would appreciate if this discussion would not be derailed onto off-topic tracks of "exactly how many bytes were in use?" and "my memory measurement method is better than yours". -- vda -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
