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  3. July 2015

Re: Anyone Have QQRYDEGREE Turned On Without Having DB2 SMP Installed?

On 08-Jul-2015 15:14 -0600, Krill, Coy wrote:
Does anyone have QQRYDEGREE set to something other than *NONE, not
have DB2 SMP installed and if so, have you had any measurable
improvements in your end of day type processing? I've asked our
software vendor/VAR and they always leave it at *NONE. Since I have
to jump through hoops to be able to change a sysval, I'm hoping
someone has some experience before I go through the trouble of
getting dispensation to change it and test for a week or so.


The Query Degree Of Parallel Processing (QQRYDEGREE) value can be controlled _within a job_ with any of the Change Query Attributes (CHGQRYA) [using the DEGREE parameter], the QAQQINI feature [PARALLEL_DEGREE keyword in the current query options file (QAQQINI)], or the SET CURRENT DEGREE SQL statement. The batch routing for the EOD processing could set the IO parallelism [for lack of Symmetric MultiProcessing (SMP) capability being available].

[http://www.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_71/rzajq/joblevelpar.htm]
_Controlling job level parallel processing for queries_

[http://www.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_71/rzajq/smp0001.htm]
[http://www.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_71/db2/rbafzsetdegree.htm]


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