RE: Will Upgrading to V4R5 impact performance???

[rorr@xxxxxxxxxxxxxx]

>Ian Scotson said >>Rod Orr ( ex IBM) did a blurb on CFINT and how it works
on this list not long ago - maybe this can help explain the performance
issues.<<

My comments were related as to how a specific I/A CPW rating on a
non-server model might be quite different to what you need on a server
model, not really to how CFINT works.

Re upgrading to V4R5, my understanding is that if you are highly utilised
on either memory or disk activity (on or approaching the "cusp") then you
could get a noticable degradation in performance. If not, then apart from
using a little more disk space you shouldn't notice much change (after
checking/resetting all your work mgmt parameters!). If you are uncertain as
to where your current system sits on the "performance curve" it may be
worthwhile collecting performance statistics and getting a performance
expert to analyse them.

But this (generally) is true of any version/release upgrade (OS/400 or
whatever). OS's get fatter as time goes on. Whilst certain areas of
performance may be improved by specific software rewrites the number of
lines of code and new function increases, inevitably requiring more
horsepower at some time. V4R5 wasn't the biggest upgrade but was a bigger
incremental change than say V4R4. You should also be more wary if you are
intending upgrading multiple releases at once.
________________________________________________
Rod Orr