On Tue, 4 Sep 2012, S?awomir Skowron wrote:
> Valgrind returns nothing.
>
> valgrind --tool=massif --log-file=ceph_mon_valgrind ceph-mon -i 0 > log.txt
The fork is probably confusing it. I usually pass -f to ceph-mon (or
ceph-osd etc) to keep it in the foreground. Can you give that a go?
e.g.,
valgrind --tool-massif ceph-mon -i 0 -f &
and watch for the massif.out.$pid file.
Thanks!
sage
>
> ==30491== Massif, a heap profiler
> ==30491== Copyright (C) 2003-2011, and GNU GPL'd, by Nicholas Nethercote
> ==30491== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
> ==30491== Command: ceph-mon -i 0
> ==30491== Parent PID: 4013
> ==30491==
> ==30491==
>
> cat massif.out.26201
> desc: (none)
> cmd: ceph-mon -i 0
> time_unit: i
> #-----------
> snapshot=0
> #-----------
> time=0
> mem_heap_B=0
> mem_heap_extra_B=0
> mem_stacks_B=0
> heap_tree=empty
>
> What i have done wrong ??
>
> On Fri, Aug 31, 2012 at 8:34 PM, S?awomir Skowron <[email protected]> wrote:
> > I have this problem too. My mon's in 0.48.1 cluster have 10GB RAM
> > each, with 78 osd, and 2k request per minute (max) in radosgw.
> >
> > Now i have run one via valgrind. I will send output when mon grow up.
> >
> > On Fri, Aug 31, 2012 at 6:03 PM, Sage Weil <[email protected]> wrote:
> >> On Fri, 31 Aug 2012, Xiaopong Tran wrote:
> >>
> >>> Hi,
> >>>
> >>> Is there any known memory issue with mon? We have 3 mons running, and
> >>> on keeps on crashing after 2 or 3 days, and I think it's because mon
> >>> sucks up all memory.
> >>>
> >>> Here's mon after starting for 10 minutes:
> >>>
> >>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> >>> 13700 root 20 0 163m 32m 3712 S 4.3 0.1 0:05.15 ceph-mon
> >>> 2595 root 20 0 1672m 523m 0 S 1.7 1.6 954:33.56 ceph-osd
> >>> 1941 root 20 0 1292m 220m 0 S 0.7 0.7 946:40.69 ceph-osd
> >>> 2316 root 20 0 1169m 198m 0 S 0.7 0.6 420:26.74 ceph-osd
> >>> 2395 root 20 0 1149m 184m 0 S 0.7 0.6 364:29.08 ceph-osd
> >>> 2487 root 20 0 1354m 373m 0 S 0.7 1.2 401:13.97 ceph-osd
> >>> 235 root 20 0 0 0 0 S 0.3 0.0 0:37.68 kworker/4:1
> >>> 1304 root 20 0 0 0 0 S 0.3 0.0 0:00.16 jbd2/sda3-8
> >>> 1327 root 20 0 0 0 0 S 0.3 0.0 13:07.00 xfsaild/sdf1
> >>> 2011 root 20 0 1240m 177m 0 S 0.3 0.6 411:52.91 ceph-osd
> >>> 2153 root 20 0 1095m 166m 0 S 0.3 0.5 370:56.01 ceph-osd
> >>> 2725 root 20 0 1214m 186m 0 S 0.3 0.6 378:16.59 ceph-osd
> >>>
> >>> Here's the memory situation of mon on another machine, after mon has
> >>> been running for 3 hours:
> >>>
> >>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> >>> 1716 root 20 0 1923m 1.6g 4028 S 7.6 5.2 8:45.82 ceph-mon
> >>> 1923 root 20 0 774m 138m 5052 S 0.7 0.4 1:28.56 ceph-osd
> >>> 2114 root 20 0 836m 143m 4864 S 0.7 0.4 1:20.14 ceph-osd
> >>> 2304 root 20 0 863m 176m 4988 S 0.7 0.5 1:13.30 ceph-osd
> >>> 2578 root 20 0 823m 150m 5056 S 0.7 0.5 1:24.55 ceph-osd
> >>> 2781 root 20 0 819m 131m 4900 S 0.7 0.4 1:12.14 ceph-osd
> >>> 2995 root 20 0 863m 179m 5024 S 0.7 0.6 1:41.96 ceph-osd
> >>> 3474 root 20 0 888m 208m 5608 S 0.7 0.6 7:08.08 ceph-osd
> >>> 1228 root 20 0 0 0 0 S 0.3 0.0 0:07.01 jbd2/sda3-8
> >>> 1853 root 20 0 859m 176m 4820 S 0.3 0.5 1:17.01 ceph-osd
> >>> 3373 root 20 0 789m 118m 4916 S 0.3 0.4 1:06.26 ceph-osd
> >>>
> >>> And here is the situation on a third node, mon has been running
> >>> for over a week:
> >>>
> >>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> >>> 1717 root 20 0 68.8g 26g 2044 S 91.5 84.1 9220:40 ceph-mon
> >>> 1986 root 20 0 1281m 226m 0 S 1.7 0.7 1225:28 ceph-osd
> >>> 2196 root 20 0 1501m 538m 0 S 1.0 1.7 1221:54 ceph-osd
> >>> 2266 root 20 0 1121m 176m 0 S 0.7 0.5 399:23.70 ceph-osd
> >>> 2056 root 20 0 1072m 167m 0 S 0.3 0.5 403:49.76 ceph-osd
> >>> 2126 root 20 0 1412m 458m 0 S 0.3 1.4 1215:48 ceph-osd
> >>> 2337 root 20 0 1128m 188m 0 S 0.3 0.6 408:31.88 ceph-osd
> >>>
> >>> So, after a while, sooner or later, mon is going to crash, just
> >>> a matter of time.
> >>>
> >>> Does anyone see anything like this? This is kinda scary.
> >>>
> >>> OS: Debian Wheezy 3.2.0-3-amd64
> >>> Ceph: 0.48argonaut (commit:c2b20ca74249892c8e5e40c12aa14446a2bf2030)
> >>
> >> Can you try with 0.48.1argonaut?
> >>
> >> If it still happens, can you run ceph-mon through massif?
> >>
> >> valgrind --tool=massif ceph-mon -i whatever
> >>
> >> That'll generate a massif.out file (make sure it's there; you may need to
> >> specify the output file for valgrind) over time. Once ceph-mon starts
> >> eating ram, send us a copy of the file and we can hopefully see what is
> >> leaking.
> >>
> >> Thanks!
> >> sage
> >>
> >>
> >>>
> >>> With this issue on hand, I'll have to monitor it closely and
> >>> restart mon once in a while, or I will get a crash (which is
> >>> still good enough), or a system that does not respond at
> >>> all because memory is exhausted, and the whole ceph cluster
> >>> is unreachable. We had this problem in the morning, mon on one
> >>> node exhausted the memory, none of the ceph command responds
> >>> anymore, the only thing left to do is to hard reset the node.
> >>> The whole cluster was basically done at that time.
> >>>
> >>> Here is our usage situation:
> >>>
> >>> 1) A few applications which read and write data through
> >>> librados API, we have about 20-30 connections at any one time.
> >>> So far, our apps have no such memory issue, we have been
> >>> monitoring them closely.
> >>>
> >>> 2) We have a few scripts which pull data from an old storage
> >>> system, and use the rados command to put it into ceph.
> >>> Basically, just shell script. Each rados command is run
> >>> to write one object (one file), and exit. We run about
> >>> 25 scripts simultaneously, which means at any one time,
> >>> there are at most 25 connections.
> >>>
> >>> I don't think this is a very busy system. But this
> >>> memory issue is definitely a problem for us.
> >>>
> >>> Thanks for helping.
> >>>
> >>> Xiaopong
> >>> --
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> >>>
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> >
> >
> >
> > --
> > -----
> > Pozdrawiam
> >
> > S?awek "sZiBis" Skowron
>
>
>
> --
> -----
> Pozdrawiam
>
> S?awek "sZiBis" Skowron
> --
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