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oprofile

Solaris Eye for the Linux Guy… Part II (oprofile, Dtrace, and Oracle Event Trace)

Proper tool for the job

My grandfather used to say to me: “Use the proper tool for the job”.  This is important to keep in mind when faced with performance issues.  When I am faced with performance problems in Oracle, I typically start at a high level with AWR reports or Enterprise Manager to get a high level understanding of the workload.   To drill down further, the next step is to use Oracle “10046 event” tracing.  Cary Millsap created a methodology around event tracing called “Method-R” which shows how to focus in on the source of a performance problem by analyzing the components that contribute to response time.   These are all fine places to start to analyze performance problems from the “user” or “application” point of view.  But what happens if the OS is in peril?