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 proof I got screenshots looking like this: They said that before the migration it never looked like this and asked […]
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 occurred that it is a bit more complicated. Who would have thought? 21 is just 12 backwards! […]
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 emails. We will use "gopkg.in/mail.v2″ to make it simple. Below you can find a simple GoLang code to send […]
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 secure database in a way I did in article AMM vs security. After enabling Oracle Wallet and […]
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 all is just a virtualization in a big scale and if you go to public cloud […]
Parse it 🙂 Simple, right? But for sure we are not going to use tkprof for 14 000 trace files, are we? We don’t have Diagnostic Pack and we just started a complete database tracing for an hour or two, because the customer said that they encounter performance problems during this period. Now you have […]
There’s a lot of articles about installing Oracle XE 18c on Docker. But Docker is not the only containerization technology on the market. In this article, we are going to create Oracle XE 18c installation in Linux Containers (LXD) A bit of history – LXC vs LXD When we start our adventure with Linux Containers […]
In my previous post I described a case of "enq: TX – row lock contention" that was actually a network latency problem. More and more those kinds of problems (it seems like history happens all over again) caused my friend (Radosław Kut) and me to write a simple tool to analyze SQL performance from a […]
You probably heard by now about Oracle Cloud Free Tier While it sounds good, the only databases that you can use are in fact autonomous databases (which are not interesting for a tech, geeky guy like me). Of course, you have also "2 virtual machines with 1/8 OCPU and 1 GB memory each." I thought: […]