Ardent Performance Computing
Technical
November/December Highlights
In the Oracle technical universe, it seems that the end of the calendar year is always eventful. First there’s OpenWorld: obviously significant for official announcements and insight into Oracle’s strategy. It’s also the week when many top engineers around the world meet up in San Francisco to catch up over beers – justifying hotel and … Continue reading
Readable Code for Modify_Snapshot_Settings
It annoyed me slightly that when I googled modify_snapshot_settings just now and all of the examples used huge numbers for the retention with (at best) a brief comment saying what the number meant. Here is a better example with slightly more readable code. Hope a few people down the road cut-and-paste from this article instead … Continue reading
Largest Tables Including Indexes and LOBs
Just a quick code snippit. I do a lot of data pumps to move schemas between different databases; for example taking a copy of a schema to an internal database to try to reproduce a problem. Some of these schemas have some very large tables. The large tables aren’t always needed to research a particular … Continue reading
OSP #2c: Build a Standard Platform from the Bottom-Up
This is the fourth of twelve articles in a series called Operationally Scalable Practices. The first article gives an introduction and the second article contains a general overview. In short, this series suggests a comprehensive and cogent blueprint to best position organizations and DBAs for growth. This article – building a standard platform – has … Continue reading
Replicating Tanel’s Script Library
Tanel does offer a zip file with all of his scripts. The zip seems up-to-date now; I started doing this alternative technique awhile ago when the zip file didn’t seem to get updated as quickly as the raw scripts directory. Please remember that as Tanel says on his own website, “always proofread the scripts and … Continue reading
Convert Raw/Hex to Timestamp
Just filing this away on my own blog because it seems that I always have hard finding it via google. Here’s some code to convert raw/hex values into timestamps. (I’ve come across this need in two situations: [1] bind variables recorded in trace files or sql monitor and [2] hi/low values in column statistics.) As … Continue reading
Delete Archived Logs from Standby
This is a little surprising to me because it’s so simple – but I couldn’t find a script anywhere on oracle support or on the internet which elegantly (IMHO) cleaned up archived logs on a standby system. (Specifically, a RAC/thread aware script.) There are a few scripts published: Emre Baransel [2009, single-thread only, uses alert … Continue reading
OSP #2b: Build a Standard Platform from the Bottom-Up
This is the fourth of twelve articles in a series called Operationally Scalable Practices. The first article gives an introduction and the second article contains a general overview. In short, this series suggests a comprehensive and cogent blueprint to best position organizations and DBAs for growth. In the first half of this article we discussed platform standardization at a … Continue reading
OSP #2a: Build a Standard Platform from the Bottom-Up
This is the fourth of twelve articles in a series called Operationally Scalable Practices. The first article gives an introduction and the second article contains a general overview. In short, this series suggests a comprehensive and cogent blueprint to best position organizations and DBAs for growth. I hesitate greatly to use the word “standard” having seen the ways it … Continue reading
Minimal-downtime PSUs on CRS with Cloned Golden Images
About a month or two ago, I was doing some work toward developing a process to patch CRS out-of-place using cloned golden images. I held off on publishing anything because I wanted to do some testing but we’ve been so busy with deployments and maintenance over the past month that I haven’t had a chance. … Continue reading
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contact: schneider @ ardentperf.com
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