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Increase in IO Write on RAC Determines Decreasing Performance (Doc ID 1096039.1)

Last updated on JULY 06, 2021

Applies to:

Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.1.0.8 [Release 10.1 to 11.1]
Information in this document applies to any platform.

Symptoms

Increased IO writing in RAC environments can be an affected by a change in MTTR behavior.
The setting of FAST_START_MTTR_TARGET may contrast with the estimated values from  X$ESTIMATED_MTTR, and may therefore determine dirty blocks to be flushed out at maximum rate to offer crash recovery.

Cause

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