Ceph

ceph-osd memory was growing all the time,and not release to os.

OS:centos 7.6 linux 4.14.0-115.8.1.el7a.aarch64

ceph version:
ceph version 14.2.2 (4f8fa0a0024755aae7d95567c63f11d6862d55be) nautilus (stable)

os pagesize:64k

ceph memory stats:
ceph tell osd.0 heap stats
osd.0 tcmalloc heap stats:--------------------------------------------
MALLOC: 218059398608 (207957.6 MiB) Bytes in use by application
MALLOC: + 1090125824 ( 1039.6 MiB) Bytes in page heap freelist
MALLOC: + 87369096 ( 83.3 MiB) Bytes in central cache freelist
MALLOC: + 6830336 ( 6.5 MiB) Bytes in transfer cache freelist
MALLOC: + 24716200 ( 23.6 MiB) Bytes in thread cache freelists
MALLOC: + 915800064 ( 873.4 MiB) Bytes in malloc metadata
MALLOC: ------------
MALLOC: = 220184240128 (209984.1 MiB) Actual memory used (physical + s
MALLOC: + 0 ( 0.0 MiB) Bytes released to OS (aka unmappe
MALLOC: ------------
MALLOC: = 220184240128 (209984.1 MiB) Virtual address space used
MALLOC:
MALLOC: 13863556 Spans in use
MALLOC: 40 Thread heaps in use
MALLOC: 8192 Tcmalloc page size
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