Posts Categorized: Pythian
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.
Like every year, Pythian is once again holding a company-wide charity campaign to raise funds and awareness for for men’s health, specifically prostate cancer and male mental health. Sporting and sprouting the mustaches has already begun at Pythian and the game is on. While that happens, blogging fanfare also continues and this Log Buffer Edition in its Log Buffer #293 covers that and more.
Perth is far from everywhere, but not far from the Oracle technologies. Passion, knowledge, and urge to share the experience, skills, tips and knowledge brought people from across the planet to gather under one roof and learn, educate and network under the banner of Oracle with 20:20 Foresight.
Like many good stories, this one also started with an innocent question from customer: “I often check “SELECT COUNT(*) FROM TABLE;” on our old 10.2.0.4 cluster and the new Exadata. The Exadata is slower than our old cluster by few minutes. Exadata is not good at count(*) ? or other problem?” Here’s how I fixed it.
My tweet few days ago – “Personally I don’t see the point building ASM on (d)NFS. ASM suppose to exclude unnecessary layers. In NAS case it adds an additional layer.” Since then Oracle people in my Social Media environment helped me to find several legitimate reasons to run ASM on NAS. Thank you folks very much. Now I am sharing our common thoughts with the rest of the community.
There is a very strong Oracle Community in Perth, Australia. I admire many Perth based Oracle User Group volunteers who year from your organizing a great Oracle event. This year it isn’t an exception. I just spent 30 minutes going through the program and I should say the lineup of speakers is very impressive. Here’s the schedule.
While Oracle tech folks doing their best to explain meaning of not so many DNFS configuration file (oranfstab) parameters I still find an official description a bit confusing. Therefore I decided to share my understanding of the DNFS configuration parameters in hope that it will help someone or if my understanding is wrong someone corrects me :) So, if I am wrong please please please feel free to leave comments.
This Log Buffer Edition is once again here, packed with rocking and rolling blogs from the database world. Log Buffer#292 comprises of select few posts from Oracle, MySQL and the SQL Server. Enjoy.
I always followed all Oracle OpenWorld happenings through blogs, but this is the first OpenWorld that I physically attended. The blog post from Michael Abbey on tips for OOW first timers was a godsend for me. This helped me to navigate OOW like a pro. This is what I checked out..
In this guide assume we are migrating a single instance database HRDEV to a two node RAC database HRPRD with following specifications.