Database not using flashcache and IORM dbPlan is using profile

(Doc ID 2198539.1)

Last updated on NOVEMBER 17, 2016

Applies to:

Oracle Exadata Storage Server Software - Version 12.1.2.1.0 and later
Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.
IORM interdatabase plans now support profiles that improve manageability of interdatabase plans for environments with many databases.

Minimum software: Exadata cell software release 12.1.2.1.0 running Oracle Database 12c Release 1 (12.1) release 12.1.0.2 Exadata Bundle Patch 4.

Symptoms

Database performance is slow.
AWR report shows "cell single block physical" Wait Avg & user/IO is high
An inter-database IORM plan with profile directives is created on the cell.
A database initialization parameter db_performance_profile is used as a requirement for use of IORM profiles see MOS Note - 1363188.1

AWR report shows Flash Cache Savings with little percentage on the Database Flash Cache but Cell usage is high:

Flash Cache Internal Reads also report no flashcache usage:

Changes

Upgraded to 12.1.0.2 Bundle Patch 4 or higher

Cause

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