Oracle VM 3.4.2 Storage Refresh/Physical LUN Refresh of FC/SCSI storage array takes inordinate amount of time to complete (Doc ID 2210971.1)

Last updated on MAY 18, 2017

Applies to:

Oracle VM - Version 3.4.2 and later
Linux x86-64
Oracle VM 3.4.2
Fiber Channel (FC)/SCSI connected storage array with considerable number of LUNs

Symptoms

After newly installing or upgrading to Oracle VM 3.4.2, the length of time to perform storage refresh or physical LUN refresh of a Fibre-Channel (FC)/SCSI connected storage array increases considerably.
The more LUNs/paths/devices and Oracle VM Servers in use, the longer the time it takes for storage/physical LUN refresh to complete.

For example, when previously running Oracle VM 3.4.1, storage refresh of an array with a large number of LUNs took ~50 seconds.
However, after upgrading the server to Oracle VM 3.4.2, storage refresh of the same storage array now took more than 1 hour and 40 minutes to complete.

This issue affects new installations of, as well as upgrades to Oracle VM version 3.4.2.
Note that this issue does not affect iSCSI-based storage arrays.

Changes

Oracle VM, specifically, Oracle VM Server, is newly installed with or upgraded to version 3.4.2.

Cause

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