mds: set PRIO_USEFUL on num_sessions counter

This is used by dashboard and status modules,
so let's make sure we're sending it to the mgr.

Fixes: http://tracker.ceph.com/issues/21927
Signed-off-by: John Spray <john.spray@redhat.com>
(cherry picked from commit 1d0a7d1f35e1c1be472b0555323a9d2ac2d2d777)

diff --git a/src/mds/SessionMap.cc b/src/mds/SessionMap.cc
index 9d0bd4c87b66849adc640cd9872f2912ac0cbc77..581b0509cac9c4d0b0f985fab44c1ef5195db9db 100644 (file)
--- a/src/mds/SessionMap.cc
+++ b/src/mds/SessionMap.cc
@@ -47,7 +47,7 @@ void SessionMap::register_perfcounters()
   PerfCountersBuilder plb(g_ceph_context, "mds_sessions",
       l_mdssm_first, l_mdssm_last);
   plb.add_u64(l_mdssm_session_count, "session_count",
-      "Session count");
+      "Session count", "sess", PerfCountersBuilder::PRIO_USEFUL);
   plb.add_u64_counter(l_mdssm_session_add, "session_add",
       "Sessions added");
   plb.add_u64_counter(l_mdssm_session_remove, "session_remove",