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  3. October 2003

RE: FNDSTRPDM memory enhancement

Eric, the pool needs to be defined in a subsystem, it's just that it is never pointed to in a routing entry, so no jobs go there. Why that matters is, job activity will cause paging in and out, including purging one job's allocated storage to make room for the next job.

Do not use a shared pool if QPFRADJ is on for pool size, as a pool with no faults loses its memory. There's no advantage to using shared pools set to *CALC for paging here, because the main benefit there is greater IO block size, and this technique eliminates or limits IO, anyway.

More information, found with a search on SETOBJACC in the improved search site, includes

Preloading Disk Data into Main Memory <http://www-1.ibm.com/support/docview.wss?uid=nas14039d907fdde766986256d6c00698f70&rs=110>

SETOBJACC/CLRPOOL Commands <http://www-1.ibm.com/support/docview.wss?uid=nas1dc0a2297bdaefddb86256d6c0069907f&rs=110>

HTH

Vern

At 12:30 PM 10/10/2003 -0500, you wrote:
Craig,

I was thinking about SETOBJACC, to just force these source files into main
storage... but I looked at help to refresh myself, and now I'm confused.

<snip>
                    Set Object Access - Help

The Set Object Access (SETOBJACC) command temporarily changes the
speed of access to an object by bringing the object into a main
storage pool or purging it from all main storage pools.  An object
can be kept main storage resident by selecting a pool for the object
that has available space and does not have jobs associated with it.
Repeated use of the command can cause a set of objects to be
resident in a main storage pool.
<end>

The part about using a pool that does not have jobs associated with it.... I
don't remember that part.  Does that mean there has to be a pool defined
that's not allocated to a subsystem?  It's been a while since I looked at
this stuff. :(


Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



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