Oracle
In this post I show you how to get SQL strings transformed in a way that resembles the result of cursor_sharing.
As usual, the who’s-who of the Oracle tech space will be assembling in Denver the week of February 11 for the Rock Mountain Oracle Users’ Group. A plethora of Pythian employees with be speaking as will we also have a booth in the vendor hall. Please drop by and say “hi”. See the full detail of who is presenting and when.
As we all know proper use of bind variables in SQL statements is a must to make transaction processing applications scalable. So how do we find the queries that don’t use bind variables and have to be parsed each time they are executed? There is number of ways, but this article is all about the most effective way I know. If you have a better one – let me know please!
Following my “Building Integrated DWH with Oracle and Hadoop” webinar for IOUG Big Data SIG, I got a bunch of excellent follow up questions. The most frequently asked questions are: What is the minimum I need to do to get started with Hadoop? and How do I load data into Hadoop? Since so many people are interested in the same question, it makes more sense to answer on the blog.
I recently helped setup an Exadata X2-8 Database Machine with the latest version of OEM Cloud Countrol (12.1.0.2). A few documents do exist for this process. However I found a few inconsistencies and problems; I think the existing documents I found were written on older versions of OEM and older versions of the tools. I’m publishing my final procedure here with hopes that it helps you, but as always please cross-reference this with the appropriate documentation before doing anything in your own environment.
DBD::Oracle v1.54 is on its way to CPAN. In this iteration, no new feature, but a large amount of bug fixes.
In this post, I’ll demonstrate how to deploy the pre-built Oracle VM templates to create a two-node 11gR2 RAC cluster in Oracle VirtualBox.
I was recently looking at an issue where a large database server was running out of temp space. The issue had happened in the past, so the goal was to identify what had been causing the system to run out of temp. Although ORA-1555 messages will appear in the database alert log (with query text) when a query runs out of temporary space, they only talk about the query that was “unlucky” enough to be attempting to get space when the tablespace was full, not who was using the temp space.
A client recently supplied a list of 50+ SQL IDs that should receive SQL profiles, and I’ve been working with Gwen Shapira to review the list. Further discussion showed that this list had come from the Automatic SQL Tuning feature, installed by default in Oracle 11g. The report includes a list of recommended SQL profiles ordered by “Maximum Benefit”, and in our case it included several hundred statements. The expected workflow, as far as I can gather, is to see the recommendations, look at the before- and after- execution plans, and accept the recommendations. Before blindly accepting recommendations, though, I like to see what exact changes are being proposed. They aren’t listed anywhere in the report, and require some extra work to uncover. The first step is to get the automatic SQL tuning advisor report. (
This is just a small bug fix release of the plugin. It was actually quietly released for a while now of if you have downloaded the plugin recently, you have the latest version. To be sure — check the version in the Console or you will see it in the file name.
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