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Artist of Farmer?
This morning I read a twitter message by Jeff Smith (aka @hillibillitoad):OH: "Once we get our system running, we don't touch it." Yeah, that generally works pretty good.I like Jeffs tweets, blogs and...
View ArticleAccess to the database
There is a kind of discussion ongoing who should have access to a database, and under what circumstances.I have never done either of Jeffs or Chets job, so I cannot write anything reasonable about...
View ArticleORA-02393 on purpose
Today I got an email by a developer about an error on a test database.(I shortened the conversation, but tried not to change the content):Dev:We get an ORA-02393: exceeded call limit on CPU usage...
View Articleavoid implicit COMMIT at DDL
Some times, I'd like to have a transaction open, even there is a DDL somewhere in between. Oracle might have some reasons for the implicit COMMIT, but I have mine to avoid them in my transactions. Here...
View Articleestimated plan stability
Sometimes I am searching for any method to solve a problem. And after some investigations, mailing lists, direct contact of much smarter people, I come to the conclusion: It's just not possible! (Or at...
View Articleincomplete list of SRVCTL commands
As I have to dig into srvctl more than I liked to do, I figured the documentation is not complete (at least for my installation of 11.2.0.2):the Documentation for srvctl upgrade claimsThe srvctl...
View Articlewhen does PMON register to remote listeners
I had a complex problem today: I tried to setup a connection manager, but unlike Arup, I did not like to to use SOURCE_ROUTE. So I had to make the pmon register itself to the cman. As we have already...
View Articlenon-Exadata HCC
Oracles Hybrid Columnar Compression was one of the big new features of Oracle 11.2. Unfortunately someone decided this feature should only be available in Exadata. Even Oracle tried to explain it with...
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bzip2 twice?
To check the performance of RMAN backup I recently started to trace it a little bit. As most of the time was not spent in any reading from disk or writing to media manager library event, it was on CPU....
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Who created that process?
Figure 2-7Connection toa Dedicated Server ProcessFor some reason I was really curios who created that process. It's not about a particular process in detail, mir a well known kind of processes. At...
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Setting Up Oracle Connection Manager (without SOURCE_ROUTE)
This post must be seen as a direct follow up to Arup Nandas Setting Up Oracle Connection Manager.As there are many references to this post, please read it first. Problem and Solution are quite similar,...
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get your traces - yourself
I'd like to mention a small peace of software. It's called MrTrace and available in Version 2.0.0.43 right now. For me it's a tool to save time. So what is it doing at all?MrTrace is a plugin for...
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some tracing events in DBMS_SCHEDULER
I currently have the fun to review DBMS_SCHEDULER. As I'm always interested in ways to trace anything, to dig deeper in case of problems, I searched for ways to trace it.As I did not find a collected...
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restore DBMS_SCHEDULER.CREATE_CREDENTIAL cleartext password
If you want to use Oracle file watcher, you need to Create a Credential. As there a password needs to be stored in the database, Oracle tries to save it in a secure way. But as the password must be...
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total abuse of technology
I had a (for my environment) unusual request:After the migration of a Repository Database from 9i to latest 10g I was asked to keep a backup of the old DB for at least 3 years.This does not sound very...
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creating my mobile toolbox (for windows) I
I am somewhat tired to re-install the same set of software again and again, every time I (have to) switch to a new PC. Probably it's me, not the PCs, but it takes some tome to have the system setup,...
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looking close at TAF
At the moment I'm trying to collect and sort some informations about Oracles Transparent Application Failover. There is a lot of general information available in the wild, but no deeper details. Here I...
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do not touch if you do not know for sure
Oracle provides and documents a huge load of possibilities and functions for nearly every purpose. For me it is impossible to know all of them. Even to know such an area exists is hard.But still...
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how to secure CMAN against CVE-2012-1675 - or an easier method than ASO
In the Oracle DBA World at the moment CVE-2012-1675 is a great issue. Oracle announced somemethods how to secure existing systems. But these are sometimes not that easy, and there is no backport for...
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who cares if a listener is dying
In this post I try to show what's going on if a local listener dies in a 11gR2 RAC environment. My basic question is: When does (a) SCAN-Listener knows the local Listener disappeared?My testcase (a...
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