Oracle Solaris Performance, Panics, Hangs, and Dtrace (MOSC)

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vmstat run queue size too high

edited Mar 10, 2015 9:48AM in Oracle Solaris Performance, Panics, Hangs, and Dtrace (MOSC) 7 commentsAnswered ✓

Dear all,

We are facing a performance issue on a production server, nothing really significant found yet that could explain the performance issues that the project is facing, but a few things bother me, and I need some help to find the root cause :

vmstat is showing a lot of process in the run queue ( see attached file vmstat.txt ), most of the time between 30 and 50. Average load is under 2 on prstat. How can I go deeper in this kind of analysis to find what is causing this high run queue size ?

I tried to use a dtrace script to check this ( cpudispqlen.d ), and the result is kind of strange, very high queue for processor 0, much more than the others ( see attached file cpudispqlen.txt )

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