Oracle Database Appliance (ODA) (MOSC)

MOSC Banner

ALERT : Upgrading to 18.3 Can Automatically Result in ADVM Processes Consuming Excessive CPU and IO

edited Jul 26, 2019 1:32PM in Oracle Database Appliance (ODA) (MOSC) 3 comments

See the ALERT 2525427.1 for complete information:

Changes with ACFS and ADVM can result in very poor performance immediately after an upgrade to 18.1 or higher

The problem source has been identified in

     Bug 29520544 - AFTER 18.3 UPGRADE ADVM PROCESSES ARE CONSUMING HIGH CPU/IO FOR A LONG TIME

Upgrade to 18c can cause unnecessary disk resilvering on ODA (and any other system with > 1MB AUs).

The larger the ADVM volume size the higher the impact.
In particular the ODA X5-2 which uses 8T HDDs can have a significant performance impact.

  • Once started the resilvering can not be postponed or disabled.
  • Once the resilvering completes, performance will return to normal.
Tagged:

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center