Consumer rss does not honour eventing memory quota

Build 6.5.0-3687

This is coming from MB-33370
Observed that eventing consumer rss does not honour eventing memory quota set.
Here are 2 examples-
1. Eventing memory quota set to 3GB
In this case consumer rss grows till ~7GB and then becomes flat.
Job- http://perf.jenkins.couchbase.com/job/themis/3332
Cbmonitor link- http://cbmonitor.sc.couchbase.com/reports/html/?snapshot=themis_650-3687_load_access_and_wait_4b6c

2. Eventing memory quota set to 24GB
In this case consumer rss grows till ~9GB and then becomes flat and producer rss ~350MB.
Job- http://perf.jenkins.couchbase.com/job/themis/3334
Cbmonitor link- http://cbmonitor.sc.couchbase.com/reports/html/?snapshot=themis_650-3687_load_access_and_wait_d0ea

Expecting consumer rss + producer rss should be honouring eventing memory quota set.