Servers running Solaris 10u11 or 11.x with Large Amounts of Physical Memory and Small ZFS ARC Caps May Encounter IO Performance Issues
Last updated on JULY 07, 2017
Applies to:Solaris Operating System - Version 10 1/13 U11 and later
Information in this document applies to any platform.
Should the issue described in this document be encountered, collecting GUDS with the -X3 option will show the following:
For bare metal systems or Control/IO Domains:
# ./guds -q -c60 -i1 -n5 -w0 -X3 -T -r -H0 -s<SR#> -d "Slow IO Performance"
For Guest LDOMs:
# ./guds -q -c60 -i1 -n5 -w0 -X3 -T -M -r -H0 -s<SR#> -d "Slow IO Performance"
iostat shows a read-biased workload. The disk service times (asvc_t) are good with no IOs queued (wait) in the driver
Applying the Solaris 10 Recommended Patchset (10_Recommended) that contains 150400-37/150401-37 or updating to Solaris 11.3 SRU 3.6 or later
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