Ceph: HEALTH_WARN: 1 pools have more objects per pg than average

Issue

• The command ceph -s reporting 1 pools have many more objects per pg than average.
• How to change mon_pg_warn_max_object_skew.
• PG is the acronym for Placement Group

# ceph -s 
  cluster:
    id:     fc06fa{Cluster-ID-Obfuscated}605b939
    health: HEALTH_WARN
            1 pools have many more objects per pg than average                          <-- here

  services:
    mon: 3 daemons, quorum cephxx,cephyy,cephzz
    mgr: mgr-m(active), standbys: mgr-n, mgr-q
    mds: cephfs-1/1/1 up  {0=mds-1=up:active}, 1 up:standby
    osd: 48 osds: 48 up, 48 in

  data:
    pools:   7 pools, 1504 pgs
    objects: 612k objects, 1788 GB
    usage:   5363 GB used, 75051 GB / 80414 GB avail
    pgs:     1504 active+clean

  io:
    client:   6435 kB/s wr, 0 op/s rd, 137 op/s wr

# ceph health detail
HEALTH_WARN 1 pools have many more objects per pg than average
MANY_OBJECTS_PER_PG 1 pools have many more objects per pg than average
    pool `problem` objects per pg (5436) is more than 13.036 times cluster average (417) <-- here