My Oracle Support Banner

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

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.