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LGWR Hangs in IO_GETEVENTS when Access to Mirrored REDO Logs is Lost (Doc ID 850876.1)

Last updated on MARCH 09, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
SUSE \ UnitedLinux x86-64

Symptoms

On SUSE Linux Enterprise Server 10 (x86_64) PATCHLEVEL 1 and a database with mirrored redo logs on two different SAN storage systems with multipathing TURNED ON, LGWR hangs in IO_GETEVENTS system call when access to the mirrored redo log files is lost.

Changes

These database's parameters are set:

filesystemio_options=SETALL
disk_asynch_io=TRUE or filesystemio_options=ASYNCH

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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