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It has been crazy few months – organizing POUG2018 took a lot of energy but it was satisfying as hell! 😀 This weekend I had some time to prepare a new version of ODBV for Trivadis Performance Days 2018 where I
After my last article AMM vs security, Martin Berger wrote to me: well, even without AMM you can do it: write your own process which attaches to the same shm segments – and use its memory mapping (?) My respons
Most of us already know that AMM sucks. But usually, we think about disadvantages of AMM in terms of performance. Let’s see why it sucks in the terms of security 😉 Let’s create an encrypted tablespace for HR.E
In my last blog post I explained a XOR alghorithm that is used to count Oracle database block checksum. I also wrote, that sometimes you are facing problems, that are unresolvable without a low-level knowledge.
Recently I’ve started to write my own clone of BBED to have something handy and useful in extreme cases when you have to go deep and fix stuff on low level (I have only like 2 such cases a year but each time it
Some time ago I wrote a simple tool to learn about Oracle data block internals – ODBV. The series of articles can be found here: https://blog.ora-600.pl/?s=odbv&submit= and the github repo is here: https://gith
If you work as a consultant, getting remote access to your customer is sometimes a nightmare! Even when you’ll get one, there a times when you just want to get your job done and finish this nightmare. For examp
(Please tell me that I’m not the only one who thinks "Index Organized Table" instead of "Internet Of Things" when hearing IOT…) This post is inspired by Connor McDonald and his blog post from a year ago about d
While researching redo log internals for V00D00 we had to face the fact, that we know shit about real transactional behavior. When I say "real", I mean – under the hood. Even with a very simple stuff like COMMI
Before you proceed, please check out this short article written by Tanel Poder: https://blog.tanelpoder.com/2010/09/02/which-number-takes-more-space-in-an-oracle-row/ In the documentation, you can find the foll
During a research for VOODOO, we came across a lot of interesting stuff inside REDO. One of my favourites is an UPDATE, becoming an INSERT 🙂 So let’s see what has happened – I performed the following update on
Sorry for long time without post, but we are writing with Marcin Rydz a new heterogenous replication product based on archivelogs and it’s consuming a looooooot of our time 🙂 Yes I know it’s nothing new on the