RDBPROD: Dynamic Optimizer Uses Wrong Background Index Resulting in Bad Performance
(Doc ID 1480189.1)
Last updated on APRIL 16, 2024
Applies to:
Oracle Rdb Server on OpenVMS - Version 7.1 to 7.2.5.4 [Release 7.1 to 7.2]HP OpenVMS Itanium
HP OpenVMS Alpha
Symptoms
An index has been recreated. Prior to this, the performance was good and the optimizer strategy looked like:
Index INDEX_222 is now chosen as the second background index, which resulted in 7+580010 fetches instead of 5+3 fetches.
Changes
An index has been recreated.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |