Database - RAC/Scalability (MOSC)

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Red Hat Node gets fenced during RMAN backup

edited Dec 13, 2024 6:35PM in Database - RAC/Scalability (MOSC) 2 commentsAnswered

We are having an issue and I cant find the source of the problem.

Every now and again (About 5x a month not on a particular day) during the RMAN backup window the the cluster services times out and the node gets fenced.

Accordign to the Storage guy the issue is the Oracle volume where the data is read from. It is reading at an IO size of 4MB. The database is setup as default with 8K block and the default db_file_multiblock_read_count of 128.

have have included in my RMAN script to decrease the db_file_multiblock_read_count to 64, but this did not work. I have also included the RATE command to limit the backup rate to hopefully limit the reading IO size but this is also not working.

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