Last updated on SEPTEMBER 12, 2016
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
Performance on Exadata may suddenly get worse and the amount of Smart Scan may reduce. You may see excessive "cell single block physical read" waits instead of the expected "cell smart table scan". This may be after an upgrade to 12.1 or if new columns have been added to an existing table.
The change may be because of an upgrade to 12.1 or because of any other activity which results in the row size increasing resulting in more intra-block chaining
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 hundreds of Community platforms