Priority of Cics-DB2 Thread Subtasks.

Cuneyt Goksu

Priority of Cics-DB2 Thread Subtasks.
Hello List,

Our CICS Sysprogs prepared the statement below. We could not find enough info for this topic.

Do you want to share your comments, ideas, anything about that ?

We need to specify different dispatch priorities (or
Service Classes) for Cics-DB2 Thread Subtasks arising
from the same Cics region. We have been investigating the
PRIORITY parameter of the Cics DB2ENTRY definitons for a
while. It enables us to specify a dispatching priority
relative to the bearing Cics region's, HIGH, EQUAL or
LOW. We have tried to find more detailed information
about how HIGH or how LOW a priority can this be in
Redbooks, etc., but we have failed to. We have many Cics
regions whose dispatch priorities are arranged by the
various WLM Service Classes that we assign to them. When
we specify PRIORITY=HIGH for a DB2Entry in some medium
service class Cics region, can we guarantee that the DB2
request will not run with a dispatch priority higher than
a PRIORITY=EQUAL request arising from a High service
class Cics region?

Regards,

Cuneyt GOKSU
Garanti Teknoloji
Tel : 0090-212-4783210
mailto:[login to unmask email]
Visit : http://www.kultur.gov.tr



Michael Picou

Re: Priority of Cics-DB2 Thread Subtasks.
(in response to Cuneyt Goksu)
I was told in a class I took, that when PRIORITY=HIGH is coded the priority
of the request is at the CICS level and CICS priority is pushed down.

-----Original Message-----
From: Cuneyt Goksu (Garanti Teknoloji) [mailto:[login to unmask email]
Sent: Wednesday, January 10, 2001 11:13 AM
To: [login to unmask email]
Subject: Priority of Cics-DB2 Thread Subtasks.


Hello List,

Our CICS Sysprogs prepared the statement below. We could not find enough
info for this topic.

Do you want to share your comments, ideas, anything about that ?

We need to specify different dispatch priorities (or
Service Classes) for Cics-DB2 Thread Subtasks arising
from the same Cics region. We have been investigating the
PRIORITY parameter of the Cics DB2ENTRY definitons for a
while. It enables us to specify a dispatching priority
relative to the bearing Cics region's, HIGH, EQUAL or
LOW. We have tried to find more detailed information
about how HIGH or how LOW a priority can this be in
Redbooks, etc., but we have failed to. We have many Cics
regions whose dispatch priorities are arranged by the
various WLM Service Classes that we assign to them. When
we specify PRIORITY=HIGH for a DB2Entry in some medium
service class Cics region, can we guarantee that the DB2
request will not run with a dispatch priority higher than
a PRIORITY=EQUAL request arising from a High service
class Cics region?

Regards,

Cuneyt GOKSU
Garanti Teknoloji
Tel : 0090-212-4783210
mailto:[login to unmask email]
Visit : http://www.kultur.gov.tr








Walter Trovijo Jr

Re: Priority of Cics-DB2 Thread Subtasks.
(in response to Michael Picou)
Hi Cuneyt,

CICS region service class is only used if you don´t have transaction
service classes defined in WLM.
Otherwise it will only be used during CICS startup; so, you need to define
service classes with 'response time' type goals in WLM and assign
your CICS transactions to those service classes, based on CICS applid,
transaction names or transaction groups.


HTH,
Walter Trovijo Jr