Solaris QLC driver version 4.0 up to 4.02 can cause lower i/o rate and higher cpu usage
(Doc ID 1585676.1)
Last updated on AUGUST 21, 2019
Solaris Operating System - Version 10 3/05 to 11.1 [Release 10.0 to 11.0] Oracle Solaris on SPARC (64-bit) Oracle Solaris on x86-64 (64-bit) Oracle Solaris on SPARC (32-bit) Oracle Solaris on x86 (32-bit)
Introduction of Solaris QLC driver version 4.x with a new mechanism in the completion routine may cause following symptoms to appear:
lower i/o rate
high cpu consumption (visible mostly on system doing more than 100k IOPS)
On configuration using ASM, slow response time can lead to volume being put offline:
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