root@osd002:~# ceph daemon osd.2 dump_mempools
{
    "bloom_filter": {
        "items": 0,
        "bytes": 0
    },
    "bluestore_alloc": {
        "items": 15488,
        "bytes": 15488
    },
    "bluestore_cache_data": {
        "items": 3,
        "bytes": 20480
    },
    "bluestore_cache_onode": {
        "items": 185,
        "bytes": 124320
    },
    "bluestore_cache_other": {
        "items": 7702,
        "bytes": 68087
    },
    "bluestore_fsck": {
        "items": 0,
        "bytes": 0
    },
    "bluestore_txc": {
        "items": 0,
        "bytes": 0
    },
    "bluestore_writing_deferred": {
        "items": 0,
        "bytes": 0
    },
    "bluestore_writing": {
        "items": 0,
        "bytes": 0
    },
    "bluefs": {
        "items": 4440,
        "bytes": 293784
    },
    "buffer_anon": {
        "items": 4,
        "bytes": 2105360
    },
    "buffer_meta": {
        "items": 6,
        "bytes": 528
    },
    "osd": {
        "items": 181,
        "bytes": 2183584
    },
    "osd_mapbl": {
        "items": 0,
        "bytes": 0
    },
    "osd_pglog": {
        "items": 120888424,
        "bytes": 58004760512
    },
    "osdmap": {
        "items": 94,
        "bytes": 17200
    },
    "osdmap_mapping": {
        "items": 0,
        "bytes": 0
    },
    "pgmap": {
        "items": 0,
        "bytes": 0
    },
    "mds_co": {
        "items": 0,
        "bytes": 0
    },
    "unittest_1": {
        "items": 0,
        "bytes": 0
    },
    "unittest_2": {
        "items": 0,
        "bytes": 0
    },
    "total": {
        "items": 120916527,
        "bytes": 58009589343
    }
}