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DB2 LUW Performance: Sorts - The silent performance killer

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 Article Abstract:

(Scott Hayes) In one of the earlier blog posts "DB2 LUW Performance: Key Cost Measures", we introduced the number of sorts per transaction (SRTTX). In a more recent post "DB2 LUW Performance: The Most Important Cost", we looked at the importance of measuring Bufferpool Logical Reads per Transaction (BPLRTX). If performing excessive and unnecessary logical I/O is the number one performance killer for a database (and it usually is), then performing excessive and unnecessary sorts is the number two performance killer in most databases.

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