Oracle IO testing

Batched Table Access

When I first saw the suffix BATCHED in an Oracle execution plan from 12c, I was curious to see what is hidden behind and how it works. I had some spare time for testing and wanted to share my findings with you here.

My SLOB IO Testing Index

As SLOB takes the IO testing on Oracle Instance level, you need to watch for several things before you declare official testing results. My suggestion is: Don’t take any result for granted. You need to assess those before stating that you are done.

My First Experience Running SLOB – Don’t Repeat My Errors (AWR)

If you are wondering what I have been busying myself with, this post explains it. As you may have noticed, I am still testing one of the Oracle systems using the SLOB framework and learning on my way. I ran several tests with the same parameters (Readers 24) and noticed that for one reason or another awr.txt reports different runtimes.
I was wondering why I was getting inconsistent runtimes for similar conditions. The answer to the mystery was very simple: The runit.sh script just generates awr.txt reports for the last and before last awr snapshots.