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Statspack Reports
A couple of weeks ago I listed a number of scripts from 11.2.0.2 relating to AWR reports – it seems only sensible to publish a corresponding list for Statspack. In fact, there are two such lists – one...
View ArticleUpgrade Argh
Time for another of those little surprises that catch you out after the upgrade. Take a look at this “Top N” from a standard AWR report, from an instance running 11.2.0.2 Top 5 Timed Foreground Events...
View ArticleIrrational Ratios
I’ve pointed out in the past how bad the Instance Efficiency ratios are in highlighting a performance problem. Here’s a recent example from OTNrepeating the point. The question, paraphrased, was:After...
View ArticleLoad profile
I like Load profile section of Statspack or AWR reports (who doesn’t). It’s short and gives a brief understanding of what kind of work a database does. But what if you don’t have an access to Statspack...
View ArticleStatspack quiz
I’ve a level 5 Statspack report from a real production 11.2.0.2 database with the following Top 5 Timed events section:read more
View ArticleAnalysing Statspack 13
A recent (Jan 2013) post on the OTN database forum reported a performance problem on Oracle 9.2.0.6 (so no AWR), and posted a complete statspack report to one of the public file-sharing sites. It’s...
View ArticleTransactions
It’s very easy to get a lot of information from an AWR (or Statspack) report – provided you remember what all the numbers represent. From time to time I find that someone asks me a question about some...
View ArticleTransactions 2
Here’s a little follow-on from Friday’s posting. I’ll start it off as a quiz, and follow up tomorrow with an explanation of the results (though someone will probably have given the correct solution by...
View Article12c Statspack Hack
Starting from a comment on an old statspack/AWR page, with a near-simultaneous thread appearing on OTN, (do read both) here’s a quick summary of getting statspack onto 12c with containers. (For...
View ArticleLock Time
Here’s a little detail I was forced to re-learn yesterday; it’s one of those things where it’s easy to say “yes, obviously” AFTER you’ve had it explained so I’m going to start by posing it as a...
View ArticleTable Scans
It’s amazing how easy it is to interpret a number incorrectly until the point comes where you have to look at it closely – and then you realise that there was a lot more to the number than your initial...
View ArticleFixed Stats
There are quite a lot of systems around the world that aren’t using the AWR(automatic workload repository) and ASH (active session history) tools to help them with trouble shooting because of the...
View ArticleFast Now, Fast Later
The following is the text of an article I published in the UKOUG magazine several years ago (2010), but I came across it recently while writing up some notes for a presentation and thought it would be...
View ArticleImproving Statspack Experience
I’ve published a few month ago an article in the UKOUG OracleScene magazine on Improving Statspack Experience: quick setup script, changing settings, filling Idle Events,etc. In the article, I used...
View ArticleCase Study – 1
It has been some time since I wrote an article walking through the analysis of information on an AWR report, but a nice example appeared a few weeks ago on Twitter that broke a big AWR picture into a...
View ArticleStatspack installation scripts
When Diagnostic Pack is disabled, either because you don’t have Diagnostic Pack or you are in Standard Edition, I highly recommend to install Statspack. When you will need it, to investigate on an...
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