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From time to time I get questions on my trainings, what is the difference between TRUNCATE TABLE and TRUNCATE TABLE DROP STORAGE… well, there is no difference because DROP STORAGE is default 😉 DROP STORAGE Spe
Recently I wanted to demonstrate to some people on my training, how Oracle database maintains blocks in a datafile – what happens after truncate, truncate with drop storage clause, delete, regular insert, direc
Joining the OTN Appreciation Day 🙂 I really like the new pragma UDF feature for PL/SQL – it makes me believe that context switches will be less painful in the future 🙂 I wrote a little bit more about it here:
I know – everyone knows, that PL/SQL packages are faster than stored procedures. If you’ll ask anyone at the training or in your dev team "what is better" – you’ll (almost) always hear: PL/SQL packages. But why
Years pass by and I think that the more I’m trying to understand the Oracle RDBMS – the less I know. Recently I started to examine the behavior of session cursor cache and I noticed an interesting thing. But le
Since the promotion tickets for the first international Oracle conference in Poland (poug.org/en) are sold out, I’ve decided to create a little contest allowing you to win a voucher code for -20% of the current
Sometimes you drop something by accident – you know, the syndrome called "An Enter Too Far". If you drop a table, the case is easy – you can use recyclebin to restore it. But when you drop a package or procedur
This will be just short article with very simple trick, showing how to match the ASMLib devices with actual multipath devices. I’m sure there is a simpler way… but I just love using AWK 🙂 If you know a simpler
Let’s fuckup the cluster!
Well it has been a month since my last blog post, so I think it’s time to write something 🙂 Those context switches can be a real pain in the ass – there is a great article by Frits Hoogland about context switc
Virtual hosts on Exadata with OVM are HVM and not PV. This is one of the limitations of Infiniband SR-IOV – can’t be used with PV. So there is a qemu used to emulate the hardware
This week I had a "pleasure" of reimaging Exadata server to use OVM. During this process we hit interesting problem – after the reimaging process there was no bridge at DOM0, corresponding to the client network