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So we continue our journey to understand the nature of buffer cache and forcing DBWR process to write our changes to disk. If you want to follow this thread – you should get familiar with at least those blog po
Check out those charts: During my last performance tuning audit I found out that database is consuming big amounts of CPU on parsing. One of the queries that took significant amount of time was rather a small D
Halloween started really scary this year – some company called us and said, that they have some problems with their Oracle Database Standard Edition. Apparently they had a storage crash six months before, which
You may already read my articles about virtualization/cloud security: In the above articles I was impersonating an evil cloud administrator and showing you how this kind of person can access and modify even enc
Recently a customer called us that there is something wrong after upgrading Oracle Database to 19.15 on RedHat. Apparently The amount of RAM consumed by DBWR and process servers became really impressive – as a
Six years ago I wrote a short instruction on how to restore OCR and Votedisk in RAC 12c after a diskgroup failure. Yesterday I had a possibility of validating my procedure in 21c RAC environment and it has occu
So you have migrated your databases to cloud and you want to feel a bit more secure – what do you do? Of course you follow the golden rule and you encrypt you tablespaces. That’s reasonable and that’s what vend
Inspired by a little chat with Frits Hoogland about the future of programming languages I challenged myself to learn a bit of Rust and show how to create a shared library to send emails and attach it to Oracle
This short article is a result of the following Twitter activity: So let’s do it! First of all, you have to install GoLang: https://golang.org/doc/install Once this is done, we can create a Go program to send e
Remember my post, regarding dumping the SGA to read encrypted blocks? What if I tell you, that you can do the same, while being a KVM host administrator with no credentials to a VM itself? Let’s prepare our sec
In my previous article I described a few technics of accessing a guest virtual machine from the virtualization host (KVM) without any credentials. It assumed that our data can get compromised by a corrupted ven
So apparently this cloud-thing is here for good. You may even say that it became endemic 😉 With cloud there is one potential problem – the bigger and heavier it is, the more possible is the leak. Cloud after a