We mulled over these options but decided that disk I/O was not our bottle
neck.  This was indicated by our Symm Manager software by EMC and by
Perfview showing very low disk usage.


Carl

-----Original Message-----
From: Peter Chong [mailto:[log in to unmask]]
Sent: Monday, November 01, 1999 6:47 PM
To: [log in to unmask]
Subject: Re: Performance question


Hi, Carl

Can you move group of dataset, like automatic and master set to one volume
set and details dataset to the other volume set? and make few extension as
possible?
In schema,what is number of $control BlockMax? can you increase to max
(2560)?

Cheers
Peter C.
>>> Carl McNamee <[log in to unmask]> 11/01 11:22 AM >>>
We ran into a unique situation this weekend while testing some batch jobs
that will be used to perform a database conversion next weekend and I would
like to see what the gurus of the list think could be causing us grief.

We have 24 databases split between 6 volume sets.  We are extracting the
data from then into flat files that reside on 8 different volume sets.  So
far the process worked very smoothly.

Next we put all the records from the flat files back into databases.  What
we see on the system is that when running more that one of these batch jobs
they start impeding on some resource.  We have eliminated the Put/Delete
semaphore by having each batch job write to a different database.  Disk and
memory utilization is very low so I do not believe that we have a bottle
neck there.  Global CPU is only at 40% during this time.

My thoughts are that we are having problems with a global semaphore but I
cannot figure out which it may be or if there is a possibility of working
around the problem short of running 1 or 2 batch jobs at a time.  This is
happening on both a 996/800 and a 969/400.  Both systems are on MPE 6.0.

Any thoughts on this issue will be appreciated.

Carl McNamee
Systems Administrator
Billing Concepts
(210) 949-7282