Workaround: if it is not possible to upgrade to ZCM 11.1 at this time, in the interim, Novell has made a Patch available for testing, in the form of a Field Test File (FTF): it can be obtained at https://download.novell.com/Download?buildid=Yn3kZr1OyPc~ as "ZCM 11 - high CPU utilization when downloading Linux subscriptions - see TID 7007853". This Patch should only be applied if the symptoms above are being experienced, and are causing problems.
This Patch has had limited testing, and should not be used in a production system without first being checked in a test environment. Some Patches have specific requirements for deployment, it is very important to follow any instructions in the readme at the download site. Please report any problems encountered when using this Patch, by using the feedback link on this TID.