>But I do think calling it "significant" would be stretch for people still
using
>the default / sample MAXVIRT

Perhaps you're alluding to the fact that the default MAXVIRT of 16M is
"archaically" small, as in "how much module stuff can you cache in 16M
anyway...". Of course what is "significant" to some might not be to others.
Certainly "noticeable" (at least if you're looking).

>Is this the whole cache that gets invalidated on refresh? Or just
>the library / libraries specified? And does specifying specific libraries
>make sense?

This is the difference between "refresh" (F LLA,REFRESH) and "update"
(referencing a CSVLLAxx parmlib member which identifies the
library/libraries to be updated).  Think of refresh as "update all
libraries" and think of "update a library" as "invalidate anything related
to that library and start over". So if you're only changing one library,
then doing an LLA refresh is serious overkill.

That is why references were made to using CSVLLAxx (sort of a "targeted
update") as opposed to refresh (the sledgehammer approach).

Peter Relson
z/OS Core Technology Design
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