Allow use of DRDA QRYDTA block sizes greater than 32K
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Key: DERBY-959
URL: http://issues.apache.org/jira/browse/DERBY-959
Project: Derby
Type: Improvement
Components: Network Client, Performance, Network Server
Versions: 10.2.0.0, 10.1.1.0, 10.1.1.1, 10.1.1.2
Reporter: Bryan Pendleton
Priority: Minor
I came across the following statement in the DRDA spec (Volume 1, page 12):
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 accomodating the larger data volumes
required by modern, more data-intensive applications.
The importance of larger block sizes depends strong on the application
profile.. For example, many applications perform single-record selects,
and they are not influenced by the block size.
But for some applications, it seems like the ability to use a larger block
size could be quite valuable.
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