Lots of read by other session On The Same Block After Applying 10.2.0.5 Patchset When AIO Is In Use
(Doc ID 1166003.1)
Last updated on MARCH 10, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.5 to 10.2.0.5 [Release 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
o Recently, patchset 10.2.0.5 has been recently applied.
o Since then, querying WRH$_EVENT_NAME hangs waiting for 'read by other session' on the same block. This may happen with other objects too not only that particular AWR table.
o AWR reports can not be generated too. This is in case an AWR table is involved.
o Errorstack for one of the blocker processes show I/O problems.
o AIO is in use.
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