Any sort items? We had an Invoice Header set that generated tens of
millions of Disk I/O's for barely 25000 entries. If there are Sort
Items, presort by the longest sort chain first.

Carl McNamee wrote:
>
> 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