Posts Categorized: Pythian
This post is the first in a series of discussions … perhaps you have never had the pleasure of needing to change a character set. If you have not and soon do, purchase a good sleeping bag as you may be at the office late for a few days to get the task accomplished.
I made this blog title intentionally provocative. However it isn’t far from the truth. Don’t believe me? Continue reading :)
Any database upgrade suppose to change SQLs’ execution plans for the better. In 99 cases out of 100 this is exactly what happens. What to do with rest 1% of the SQLs? This blog post is exactly about such unlucky case I have resolved today. Hope that you will learn something out of it. As always let me know what you think using the comments section at the end of the post.
I find myself forgetting on how to disable Oracle AUTO_TASKs on regular basis. Therefore I have decided to document it under this small blog post. As an additional bonus I may hear others experience in the area. So if you disagree or have some other experience please do not hesitate to comment under this post.
Log writer process of Oracle is one of the most revered background process, a real work horse, a real charming darling who keeps the whole Oracle database system consistent and humming beautifully and many technologies in Oracle sprout from this good old process. Consistency is the key in database systems, and so in the Log Buffer Editions, and this Log Buffer #294 continues it. And yes, the coolest 2012 PASS Summit is also there.
Just received a page about “Corrupt block”. From the first look it kind of scary to receive such page 40 minutes before your shift ends. Right?
After examining an alert.log (see below) and looking through knowledge bases found an explanation that it isn’t as bad as I thought. I liked the explanation I found therefore I decided to share it with rest of the world. Here you go folks
In this blog post I am publishing my SLOB tests results and conclusions testing Oracle database IO performance placing data files on NFS directly and on ASM disk group located on NFS.
Timezones can be darn confusing. So I thought, wouldn’t be nice to be able to switch the times back and forth on a webpage, such that you don’t have to juggle the time differences in your head, but rather just see the full thing first from your timezone perspective, then from the other guy’s?
The trick is simple: bundle all the files to be shared into a tarball called shared-files.tar.gz. As there is now only that one file, which name always remains the same, any new install is conveniently clobbering the old version.
In this post, I will explain a little more deeply the physical structure of a SQL Server data file. Unfortunately, I cannot write all the assumptions, behaviours and details about this theme, but you will read a good overview of a file structure and a good start point to understand, and read more, about indexes internals, file fragmentation, transaction log internals and so on… Before we start, let’s remember some vital concepts.