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Spotlight on DB2 6.10 - Getting Started Guide

Buffer Pool HR

The buffer pool hit ratio for an application. This is the ratio of physical reads to logical reads, expressed as a percentage. It is a measure of how often reads are made from pages that are already in a buffer pool compared to how often they are made from pages that must be loaded from disk. A higher percentage indicates more data is being read from the buffer pool. This means a lower frequency of disk I/O. A lower percentage means more data is being read from disk. This means a higher frequency of disk I/O and slower performance.

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