Thursday, October 8, 2009

Performance, PeopleSoft, IT Philosophy, Links, Hyperion


Over at Alberto Dell'Era's blog we have the start of a series on the statistical density of "cardinality" in the CBO.

I wish I could say my math and logic skills were anywhere near close enough to keep up with Cary Milsap, former VP of Oracle for all things performance and originator of the Method R approach to optimization, but they're not. But I still advocate them in principle, if not personal practise, and so recommend this article on the Importance of Diagnosing Before Resolving at his blog.


Need to find how many concurrent users there are on PeopleSoft? Here's a handy script at ERP Associates' PeopleSoft Corner.

IT Philosophy

One of keys to solving complex IT problems, especially the tense situations when a key server is down and the fingers are pointing in flocks, is finding a likely cause. That search is often more difficult than it first appears. Let's say the database is down: Call Oracle, right? But what if you go through the steps and it turns out that the DB is fine, but someone wrote over a firewall configuration that didn't include its ports and ... kerfluey. These chains of causation can be lengthy and multifactorial. It is rare to have the opportunity to do full RCA on the matter. The main concern is usually getting the users reconnected, assigning blame, and moving along smartly. But I would ask you to keep the scientific approach always there. A majority of people nodding and saying: Yup, it's the application server, does not necessarily mean that it is the cause of the problem. Logic, not majority sentiment, should always prevail in IT troubleshooting. With that long and tedious preface, please read this item from the adhd ocd blog on nonsense correlations. And for another viewpoint on statistics and the manipulation thereof, have a look at Kosher Visualization over at the I'M JUST A SIMPLE DBA ON A COMPLEX PRODUCTION SYSTEM blog. Want to meet some of the bloggers you read here at the Infogram? Get together with them at Oracle Open World as described in this posting at the same blog, along with a batch of other links of interest.


A few handy links in this posting by Eddie Awad, all of interest to the DBA/Developer/Designer types out there. Oh, and 36,000 scripts. For those of you who really need something to do for the next ten years, test them out.

Not Oracle related, more like amusing psychology, but this link at Eddie's blog is fun too.


A good Hyperion posting recently over at Rittman Mead Consulting: Oracle Essbase – Integration with Relational Sources and Applications.

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