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From Army <qoz...@gmail.com>
Subject Re: [jira] Updated: (DERBY-959) Allow use of DRDA QRYDTA block sizes greater than 32K
Date Tue, 13 Jun 2006 15:16:09 GMT
Bryan Pendleton wrote:
> Why did you pick 10 Meg as the new max value? Was that arbitrary, or 
> does it derive from some other fundamental limit?

In the DDM manual that I have (version 3 volume 3, which I think is from 2004) 
the max value for QRYBLKSZ is listed as "MAXVAL 10,485,760 (10M)".  Also, in the 
DRDA manual for the same year, under the heading "Simplified Query Processing 
Rules", there's the following quote:

"Blocking applies only to the QRYDTA reply objects.  Each query block is a 
QRYDTA DSS. The maximum query block size value allowed in the qryblksz parameter 
is increased from 32K to 10M, thus accommodating the larger data volumes 
required by modern, more data-intensive applications."

I'm not sure if these are the most recent versions of the manuals, but I think 
this is probably where the 10M limit comes from...

Army


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