Oracle
As some of you probably already noticed, there was a thread on AskTom discussing the scalability tests I did back in 2007. You are welcome to read the entire thread, but in a nutshell, Tom Kyte claimed that my tests did not reflect how one would use the result cache in the real world. What is “real world?”
Karun Dutt and I managed to get DBD::Oracle 1.21 to install on a 64-bit Linux OS against the Oracle 11 full client. Here’s what we did.
The 11i TXK AutoConfig and Templates Rollup Patch S (6372396) was released on May 5th. This patch differs from traditional TXK autoconfig template patch releases in that the ATG team decided to include some other important TXK patches also with this release. One of these is TXK Advanced Utilities Rollup Patch C (5011249). As a side effect of this generous inclusion of import updates, the patch size has increased from 16mb (RUP R) to 65mb (RUP S).
n this post and some upcoming posts, I’m going to write more about Oracle application servers, a subject we have addressed too little on the Pythian blog. In this post, I am addressing how to bounce a whole application server, including all tiers and databases from one location. The reason being, I have a request from a client to have the application server be bounced automatically during the weekend to release swaps and to address memory leaks.
If you check out the “Butterfly Effect” on Wikipedia, you’ll find a rather interesting reference to, “sensitive dependence on initial conditions in chaos theory.” Fascinating use of phrase that probably doesn’t mean much to normal people until it happens to you. I could give you lots of theoretical examples, but perhaps a real-life one will make more sense.
A few days ago, a developer and I had an interesting conversation. The developer was trying to tune an expensive SQL statement, using a trial-and-error method. After looking at his method in amusement, I showed him how to identify and tune SQL statements scientifically, and decided to blog about it. Let’s look at a simple case and then proceed to slightly more complex versions.
I have just managed to get DBD::Oracle to successfully compile, install, and test with the 11.1.0.6.0 Instant Client (IC) on a Linux (32bit) OS. It seems Oracle, in its wisdom, has changed the folder structure yet again, so to get it to compile, try this….
I ran into an 11i E-Business Suite instance which is using Apache/JServ to do forms load-balancing. Here is quick sketch of the instance architecture, a brief overview on how forms load-balancing happens in above architecture, and me more technical details — basically, the XML tags in the Context XML file in APPL_TOP that need to be edited.
The latest release of DBD::Oracle is now ready and can be found at: CPAN DBD::Oracle. It is a Perl module that works with the DBI module to provide access to Oracle databases. The release has been fully tested with the latest version of DBI (1.601). I also included a list of the changes and/or fixes in this release.
It is quite common for Oracle Tech support, while troubleshooting any 11i E-Business Suite Self Service Applications (SSWA) related error messages, to ask to enable debug logging in JServ configuration files. The procedure we followed here saved us a complete bounce of Apache, but unfortunately, for changes in jserv.conf to take effect, we still need a complete Apache bounce. This trick will only work for files jserv.properties, forms.properties, viewer4i.properties, and xmlsvcs.properties.
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