I'd like to restart this debate about tcmalloc slow leaks in MDS. This time around I have some charts. Looking at OSDs and MONs, it doesn't seam to affect those (as much). Here's the chart: http://i.imgur.com/xMCINAD.png The first two humps are the latest stable MDS version with tcmalloc till MDS gets killed by the OOM killer. The last restart MDS build of the same git tag without tcmalloc linked into it. I know that older tcmalloc version have leaks when allocating larger blocks of memory: https://code.google.com/p/gperftools/issues/detail?id=368 So it's possible that there is some kind of allocation pattern in MDS that causes this behavior or exposes this tcmalloc bug. Last time I bought it up there was resistance to tossing tcmalloc, which is fine. What I'd like to see is not linking against tcmalloc on systems that are know to have a buggy tcmalloc (in this case ubuntu 12.04, older Debian systems). -- Milosz Tanski CTO 10 East 53rd Street, 37th floor New York, NY 10022 p: 646-253-9055 e: milosz@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
