Running Ceph with the tcmalloc heap profiler [feedly]

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Running Ceph with the tcmalloc heap profiler
// Ceph

When running a Ceph cluster from sources, the tcmalloc heap profiler can be started for all daemons with:

CEPH_HEAP_PROFILER_INIT=true \    CEPH_NUM_MON=1 CEPH_NUM_OSD=3 \    ./vstart.sh -n -X -l mon osd  

The osd.0 stats can be displayed with

$ ceph tell osd.0 heap stats  *** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***  osd.0tcmalloc heap stats:------------------------------------------------  MALLOC:        6084984 (    5.8 MiB) Bytes in use by application  MALLOC: +       180224 (    0.2 MiB) Bytes in page heap freelist  MALLOC: +      1430776 (    1.4 MiB) Bytes in central cache freelist  MALLOC: +      7402112 (    7.1 MiB) Bytes in transfer cache freelist  MALLOC: +      5873424 (    5.6 MiB) Bytes in thread cache freelists  MALLOC: +      1290392 (    1.2 MiB) Bytes in malloc metadata  MALLOC:   ------------  MALLOC: =     22261912 (   21.2 MiB) Actual memory used (physical + swap)  MALLOC: +            0 (    0.0 MiB) Bytes released to OS (aka unmapped)  MALLOC:   ------------  MALLOC: =     22261912 (   21.2 MiB) Virtual address space used  MALLOC:  MALLOC:           1212              Spans in use  MALLOC:             65              Thread heaps in use  MALLOC:           8192              Tcmalloc page size  ------------------------------------------------  

See the Ceph memory profiling documentation for more information.

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