Verified in Satellite 6.3 Snap 31/35. The tested behavior, in Snap 31, shows an increase of approximately 1MB qpid memory consumption per additional host running katello-agent. Scaling up to 10k hosts, running katello-agent, qpid showed a memory consumption around 10G. This is a 60% drop from the consumption in the initial report! Additionally, none of our automated or manual tests have shown any breakage from incorporating the new qpid version.
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, 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/RHBA-2018:0338