Offloaded smart scan performance is incorrectly throttled on Extreme Flash storage servers
(Doc ID 2619367.1)
Last updated on DECEMBER 18, 2019
Applies to:Oracle Exadata Storage Server Software - Version 18.104.22.168.0 and later
Information in this document applies to any platform.
Due to bug 30492121, large I/Os on Extreme Flash storage servers are incorrectly throttled, which can result in significant performance impact to smart scan throughput. To determine if you are experiencing this issue, run script metric_iorm.pl from <Document 1337265.1> on each storage server to identify if all storage servers are experiencing large I/O queue waits greater than 10ms.
For example, the following dcli command will run metric_iorm.pl on each storage server and show cases where Large I/O queue time exceeds 10ms.
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!
In this Document
|Implement the workaround|
|Remove the workaround|