The progress module in the manager causes a lot of load, especially if the cluster is not healthy. This results in blocking of other modules like the prometheus endpoint. Skip pg_summary update if _events dict is empty since the get call of pg_stats and pg_ready are expensive and are not necessary in this case. This avoids blocking other modules like the prometheus module
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Important: Red Hat Ceph Storage 4.2 Security and Bug Fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2021:0081