session statistics

A brief history of time^H^H Oracle session statistics

I didn’t intend to write another blog post yesterday evening at all, but found something that was worth sharing and got me excited… And when I started writing I intended it to be a short post, too.

If you have been digging around Oracle session performance counters a little you undoubtedly noticed how their number has increased with every release, and even with every patch set. Unfortunately I don’t have a 11.1 system (or earlier) at my disposal to test, but here is a comparison of how Oracle has instrumented the database. I have already ditched my 12.1.0.1 system as well, so no comparison there either :( This is Oracle on Linux.

The script