s***@maccnet.com
2006-07-07 15:02:32 UTC
We recently upgraded from VSE/ESA 2.6.2 to z/VSE 3.1, when we moved
from a 9672 RA6 processor to a new z890 (2086-A04). We went from 88
MIPS to 150 MIPS. We run 4 VSE guests under zVM 5.2. We went from 2G
of memory to 8G. We utilize only one engine.
Our shop runs 95% batch, 24X7, with very little daily CICS data entry.
Our expectations were, that with the additional memory and increased
speed of the box, our VSE batch jobs would run more quickly.
Unfortunately, that's not what we're seeing. In fact, our schedulers,
developers and end-users have not seen a notable difference in the
amount of machine time that jobs require to complete.
This is obviously disturbing, since the whole reason we installed the
new z was to improve our throughput and allow for expected business
growth.
Hopefully, the issues we're experiencing with performance are related
to under-utilized memory and/or a poorly tuned system. Perhaps too
much of our "old" system crept forward into our new. Perhaps it's a
caching issue and we need to research products to assist with that.
(We used to use Cache Magic from SDI, but it won't run on zVM V5).
Perhaps our jobs are I/O bound and we need to determine that. The
problem is, we don't really know where to start.....
I would greatly appreciate any and all suggestions you may have.
Thank you.
from a 9672 RA6 processor to a new z890 (2086-A04). We went from 88
MIPS to 150 MIPS. We run 4 VSE guests under zVM 5.2. We went from 2G
of memory to 8G. We utilize only one engine.
Our shop runs 95% batch, 24X7, with very little daily CICS data entry.
Our expectations were, that with the additional memory and increased
speed of the box, our VSE batch jobs would run more quickly.
Unfortunately, that's not what we're seeing. In fact, our schedulers,
developers and end-users have not seen a notable difference in the
amount of machine time that jobs require to complete.
This is obviously disturbing, since the whole reason we installed the
new z was to improve our throughput and allow for expected business
growth.
Hopefully, the issues we're experiencing with performance are related
to under-utilized memory and/or a poorly tuned system. Perhaps too
much of our "old" system crept forward into our new. Perhaps it's a
caching issue and we need to research products to assist with that.
(We used to use Cache Magic from SDI, but it won't run on zVM V5).
Perhaps our jobs are I/O bound and we need to determine that. The
problem is, we don't really know where to start.....
I would greatly appreciate any and all suggestions you may have.
Thank you.