FIELD NOTESTHE ORA-600 BLOGSearch /BROWSE THE FIELD NOTES
118 field notes / page 2 of 10
We are continuing our journey as an evil KVM administrator who wants to mess with a tenants virtual machines. This time we will modify a binary execution code path by changing machine code opcodes in a running
Shit happens. We had recently another customer who can relate to that absolute truth – after a serious storage problem, they managed to restore only data files from one mount point. In theory they were lucky be
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