Thank you all for attending, commenting and discussing my presentations at DOAG Konferenz 2021. I am happy about the good feedback, and the attendance in the rooms. Meeting some of you in DOAG’s GatherTown was a good thing, to mimic the real conference center in Nuremberg. But still a mimic! I’m looking forward to DOAG […]
Tag: Oracle
Very cool interview with Maria Colgan
Community work can be so much fun. When working for the German Oracle User Group, DOAG, one of my favourite jobs is interviewing interesting people for doag.tv. In fall 2019, we recorded a fun interview with Maria Colgan, Master Product Manager for the Oracle Database. I had the chance to prepare the story: Based on […]
Oracle PGA Analysis Query
Sometimes, something in an Oracle Database starts eating PGA, and there is need to find out which process, and where the memory is left, and what or who is responsible for allocating / using / holding it. For a recent issue, I wrote the SQL below. It gives back one line for each Category (SQL, […]
Oracle ACE Director
Uh, there has been no blog entry for some time, had a busy time. So now I have a good reason to blog after returning from Collaborate18 in Las Vegas, where I had the chance to present two talks about SQL Tuning and Oracle Performance on VMware. The Oracle ACE Program usually hosts a dinner […]
Oracle RAC 12.2 High Load on CPU from gdb when Node Missing
Recently I had to battle a new issue with the quite-new Oracle Database RAC Version 12.2.0.1 on Linux x86_64. The idea of RAC is, to compensate the loss of a node or service by restarting services on other nodes. But in my case, when one node in a two-node-Cluster was down (or the crs stack […]
Oracle Enterprise Linux 7: How to stop bash tab completion from escaping the dollar $
Did you ever wonder why bash in Oracle Linux, Red Hat Enterprise Linux and other recent Linuxes escapes the dollar sign ($) when completing paths with the tabulator (tab) key like that: [oracle@oratest01 ~]$ (KLM12102) ls -l \$ORACLE_BASE/diag Answer In bash >= 4.2.29 you have a “direxpand” option, which is NOT set by default. The […]
Oracle: How to identify SQL doing TABLE ACCESS FULL on a given partition
In my last post, I described a quick show case for Oracle 12c Automatic Big Table Caching. But ABTC is just a crock, nevertheless a useful one. The biggest help from Automatic Big Table Caching for “sustainable” database performance management is the temperature of segments, heated up by TABLE ACCESS FULL. In my case, after enabling ABTC […]
Looking forward to speaking at COLLABORATE16 IOUG Forum
Yes, I did it again, submitted and got two papers accepted – speaking at COLLABORATE16 in Las Vegas (#C16LV) is always a highlight of the year! This time, it will be: The Bad One In Your Crop – SQL Tuning Analysis For DBAs 4:30 PM–5:30 PM Apr 11, 2016, Palm-A Oracle Core: 12c InMemory Column […]
Featured by Oracle Magazine
The Oracle Magazine featured me in its January / February 2016 issue. I really feel honoured and would like to say thank you for the opportunity! For details, please see the Performing Databases Blog post about the publication. […]
How to disable Oracle ACFS drivers / registry resource
Sometimes an installed ACFS can cause trouble, especially if we don’t or can’t use it (e.g. when not using an UEK Linux kernel, like with SuSE Linux Enterprise Server SLES). There’s lots of documentation how to create and maintain ACFS file systems, but how to get rid of ACFS at all wasn’t so easy to […]