Running vmstat or iostat in a Non-Global Zone can be much slower than the global zone and may cause increased %sys in the global zone

(Doc ID 1959892.1)

Last updated on SEPTEMBER 26, 2016

Applies to:

Solaris Operating System - Version 11 11/11 to 11.2 [Release 11.0]
Solaris x64/x86 Operating System - Version 11 11/11 to 11.2 [Release 11.0]
Information in this document applies to any platform.


A noticable increase in %sys will be seen in the global zone while running vmstat or iostat in the Non-Global Zone(s).  %sys rises sharply when vmstat(1M) is executed in two or more non-global zones at the same time. When vmstat(1M) executed only in one zone, the increase of %sys is smaller.  This issue affects commands such as vmstat, prstat, iostat, etc.

The output of sar(1M) from the global zone when vmstat starts may look like this:



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