Hi,
I've just started using zCX, basically only with the SSH CLI container active, and in SDSF I see the zCX address space running nearly always with 100% zIIP usage.  I don't have SMT enabled yet.  If I enable SMT will this change, or is it normal to have such high zIIP usage regardless of how many containers may be in use?

This is z/OS 2.5 at PUT2303/RSU2303. 

Docker --version reports:
Docker version 20.10.12, build 20.10.12-0ubuntu2~20.04.1

Thanks,

Peter

Well, a bit more digging shows that this seems to be an SDSF feature, showing which jobs are using zIIPs as a percent of all jobs using zIIPs, as RMF only shows the zCX address space rarely using the zIIPs.

During normal idling, RMF shows the zCX job using about 5% of a zIIP.  Starting a container takes it up to about 30% for a minute or two.

So, false alarm...

Thanks for your patience  :-)