Oracle ZFS Storage Appliance: Some systems with LOW Memory configurations might not run reliably/stable with 2013.1.x releases (Doc ID 2043383.1)

Last updated on NOVEMBER 01, 2015

Applies to:

Sun ZFS Storage 7120 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

It has been reported in some situations that ZFS Storage Appliances configured with 24GB of RAM display some instability after they have been updated from 2011 code to OS8 code basis.
Systems configured with 24GB are also referred to as 'low memory configurations' and after updating the appliance kit software from a 2011 code release to an 2013.1.x (OS8) release, the additional new features in that new major release require more memory to be allocated and could lead into a situation where the appliance might stop providing service to clients and appear hung due to kernel memory exhaustion.
The affected system might run stable for days or even weeks and then stop, there is no sign of broken hardware or other defects on the system and a reboot clears the situation. After about the same time, the appliance again stops working and a reboot clears the immediate situation.
Before the software update, the ZFS Storage Appliance has been working reliably and been stable for a reasonable time and since the update it seems stop working on a certain pattern.

Cause

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