Understanding Buffer Pool Performance and ... - Quest Software

Buffer Pool Overview
Tuning Goals
• Recovery vs. Performance
– Recovery wants everything on disk
– Database manager wants everything in memory
– Which goal is more important – largely depends on data
– Which combination works best for both goals
You Can Expect More
• High hit ratio means logical reads usually successful,
avoiding disk access
• Normally want to maximize asynchronous I/O to minimize
waits