News, views, and items of interest on IBM's Db2 database management system and mainframes.
Tuesday, April 28, 2009
Basic DB2 Buffering and Memory Guidelines
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One of the most important areas for tuning DB2 subsystem performance is memory usage. DB2 for z/OS uses memory for buffer pools, the EDM poo...
Thursday, April 16, 2009
Stages 3 and 4
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All good DB2 developers and DBAs know about Stage 1 and Stage 2 predicates, right? But have you ever heard of Stage 3 and Stage 4 predicates...
Monday, March 30, 2009
Today's Modern Mainframe
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IBM mainframes process two thirds of the world’s business information every day, and have been doing so for decades, because of the many str...
1 comment:
Thursday, March 26, 2009
Cost vs. Advantage of Moving From IMS DB to DB2
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As my regular readers know, every now and then I like to share Q+A exchanges I've had with folks. Today, the question I was asked is as ...
2 comments:
Wednesday, March 18, 2009
A Short Introduction to Lock Avoidance
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Lock avoidance is a mechanism employed by DB2 for z/OS to access data without locking while still maintaining data integrity. It prohibits a...
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