Ceph

• centos 6.3
• ceph version 0.67.11 (bc8b67bef6309a32361be76cd11fb56b057ea9d2)

• Stressing the monitors with qa/workunits/mon/workloadgen.sh without cleanup

while [ 1 ]; do LOADGEN_NUM_OSDS=20 DURATION=120 ./mon_workloadgen.sh || break ; done

which eventually results in lots of osds down/out and significantly large OSDMaps (2.6MB map for 4431 osds).

• Running a loop of 'ceph log foo' with 10 parallel jobs.

• No mon thrashing involved.

'top' reports a 2.5GB VIRT usage for any of the monitors, 90MB RES.

'ceph heap stats':

[ubuntu@vpm090 ~]$ ceph tell mon.a heap stats
mon.atcmalloc heap stats:------------------------------------------------
MALLOC:       10122344 (    9.7 MiB) Bytes in use by application
MALLOC: +      7536640 (    7.2 MiB) Bytes in page heap freelist
MALLOC: +     14149264 (   13.5 MiB) Bytes in central cache freelist
MALLOC: +     20772480 (   19.8 MiB) Bytes in transfer cache freelist
MALLOC: +     13545096 (   12.9 MiB) Bytes in thread cache freelists
MALLOC: +      1264792 (    1.2 MiB) Bytes in malloc metadata
MALLOC:   ------------
MALLOC: =     67390616 (   64.3 MiB) Actual memory used (physical + swap)
MALLOC: +     62062592 (   59.2 MiB) Bytes released to OS (aka unmapped)
MALLOC:   ------------
MALLOC: =    129453208 (  123.5 MiB) Virtual address space used
MALLOC:
MALLOC:           1555              Spans in use
MALLOC:             13              Thread heaps in use
MALLOC:          32768              Tcmalloc page size
------------------------------------------------