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# ceph --admin-daemon /var/run/ceph/ceph-osd.1.asok config show | grep osd_memory
"osd_memory_base": "805306368",
"osd_memory_cache_min": "134217728",
"osd_memory_cache_resize_interval": "1.000000",
"osd_memory_expected_fragmentation": "0.150000",
"osd_memory_target": "1073741824",
"osd_memory_target_cgroup_limit_ratio": "0.800000",
# ceph tell osd.1 heap stats
osd.1 tcmalloc heap stats:------------------------------------------------
MALLOC: 4132094672 ( 3940.7 MiB) Bytes in use by application
MALLOC: + 0 ( 0.0 MiB) Bytes in page heap freelist
MALLOC: + 46692664 ( 44.5 MiB) Bytes in central cache freelist
MALLOC: + 11719680 ( 11.2 MiB) Bytes in transfer cache freelist
MALLOC: + 53055480 ( 50.6 MiB) Bytes in thread cache freelists
MALLOC: + 36700160 ( 35.0 MiB) Bytes in malloc metadata
MALLOC: ------------
MALLOC: = 4280262656 ( 4082.0 MiB) Actual memory used (physical + swap)
MALLOC: + 729333760 ( 695.5 MiB) Bytes released to OS (aka unmapped)
MALLOC: ------------
MALLOC: = 5009596416 ( 4777.5 MiB) Virtual address space used
MALLOC:
MALLOC: 457765 Spans in use
MALLOC: 38 Thread heaps in use
MALLOC: 8192 Tcmalloc page size
------------------------------------------------
Call ReleaseFreeMemory() to release freelist memory to the OS (via madvise()).
Bytes released to the OS take up virtual address space but no physical memory.
PA