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ZFS Write Performance Degrades Because All Writes Go to One VDEV (Doc ID 1405345.1)

Last updated on AUGUST 03, 2020

Applies to:

Oracle Communications Messaging Server - Version 6.0.0 and later
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)
***Checked for relevance on 21-Apr-2014***

Symptoms

The symptoms can vary, depending on which components are using the ZFS pool having the problem:

Changes

A new virtual device (VDEV) was added to the ZFS pool to provide more space.

Cause

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In this Document
Symptoms
Changes
Cause
 The long-term average stats:
 Current stats:
Solution
 To avoid the problem in the first place
 Will it eventually heal itself?
 Two types of files in the message store
 Tuning to allow the old vdevs to be used
 Results After tuning
 Long-term stats
 Current stats
References


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