Oracle ZFS Storage Appliance: Performance Issue During Backups

(Doc ID 2389560.1)

Last updated on MAY 18, 2018

Applies to:

Oracle ZFS Storage ZS3-2 - Version All Versions and later
Oracle ZFS Storage ZS3-BA - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS4-4 - Version All Versions and later
Oracle ZFS Storage ZS5-4 - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS5-4 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

After network changes: Heads are having performance issues with very high response time for backups.

We see on one of the ZFSSA nodes that the logzilla disks remain over 95% in use during the two remaining backups.

In our case we found the disk were being heavily hit for writes and the logzillas were 100% busy.

 

Changes

Prior to the performance issue there were some network changes made.  Switch spine-leaf activity was done, they are working fine now. 

 

Cause

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