Steps to reproduce:
1. Retract Event from Oaipmh-publication
For every Element of the Mediapackage one Job is created.
This is very slow. And takes a lot of load on engage.
One Job is created for retraction of one event. -> Bulk retraction
Workaround (if any):
I would like to backport the fixes to OAIPMH retraction to 3.x as this is affecting us operationally. The current workaround is to set present hosts maxload in the database artificially high.