A quick collation – and warning – for 11.2
- MOS (Metalink): Bug 9842771 - Wrong SREADTIM and MREADTIM statistics in AUX_STATS$ [ID 9842771.8] (needs MOS account)
- Comment from Sokrates in a Charles Hooper blog
- Blog item by Christian Antognini
- Blog item by Randolf Geist
Bottom line – be careful about what you do with system stats on 11.2
Footnote: the MOS link is a search string producing a list of references. I set it up like that because one of the articles referencing the bug is called “Things to consider before upgrade to 22.214.171.124″ and it’s worth reading.
Addendum: one of the people on the two-day course I’ve just run in Berlin sent me a link for a quick note on how to set your own values for the system stats if you hit this bug. It’s actually quite a reasonable thing to do whether or not you hit the bug given the way that gathering the stats can produce unsuitable figures anyway: setting system stats. (I’ve also added their company blog to the links on the right, they have a number interesting items and post fairly regularly.)