Today I had to babysit a demo machine I set-up for a proof of concept. All went well, as I expected.
A two gigabyte RAM Linux machine with SOA/BPEL 11g, two WebLogic 10.3 domains extended with ADF and Apex XE running on it. It kept running, but at one point is had only 30 megs of memory left!
Check out ‘Extending your WebLogic standalone environment with ADF runtime libraries‘ for more information about setting up the WebLogic environment with ADF.
When moving/deleting the listener.log, I used to stop and start the listener and move/delete the listener in between the actions.
This method has a big inconvenience: users can not connect to the database for a few seconds…
What I never knew was that the listener could be told to stop and start logging and take the appropriate action in between. Continue reading
When having multiple Oracle homes on Windows, how is decided which Oracle home (in the registry) is used by an Oracle binary? Which NLS_LANG or TNS_ADMIN setting from the registry is used?
The answer is binary, path, oracle.key, registry… and which for Windows. Continue reading
I have just explained a few test scenarios when trying to recover through RESETLOGS. You need to make sure you know your incarnations!
Last week I created a new database (Oracle 9.2) and got the following message when the ‘create database’ script was almost finished: ORA-01991: invalid password file.
OK, the database instance existed before, so I created a new password file with orapwd. Trying to open the database after this gave me the following message: ORA-01403: no data found. Continue reading
When getting the following message using JInitiator: “Unable to verify the certificate – code will be treated as unsigned.”, please check “Control Panel > JInitiator > Cache”, to which location Java will store the ‘Oracle Jar Cache’ and JInitiator settings (like the ‘Grant Always’ setting and ‘Oracle Jar Cache’ directory) in <USERHOME>\.jinit\properties<jinit version> and jpicerts<jinit version>.
Java will get the USERHOME path from the Windows registry [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Desktop] when looking for the Desktop path setting and truncates the ‘Desktop’ part. Most of the time this will result in the correct USERHOME directory, but when this setting is changed to a network path where users are not granted write access, Java is not able to store the Cache and JInitiator settings.
Ofcourse, this can be one of a few problems, but if you suspect a case like this, there might be a solution… Continue reading
Yesterday I had my first experience with Oracle DUL.
A customer had major disk damages on his RAID 5 system, but the backups he made daily were (sadly) never tested (lesson!). Recovery gave lots off errors on UNDO segments in the system table space. Only a 10 months old export was available.
Together with a consultant from Oracle we tried to get data from two damaged databases. For one DB, DUL could read the dictionary from the system data file, but could not read all the data from the user data files. The other DB also had a corrupt system data file, which meant that DUL was unable to read the dictionary and was unable to locate data from user data files. Continue reading
Using updates with joins is something that does not work the first time. I’ve been using Oracle, MSSQL and other DB’s before I became Oracle DBA and I always had to check resources to get it done. Now I add an other resource….
Yesterday I had a developer at my desk who accidentally dropped a few tables. Time for the Recycle Bin thingy!
Today the Agent Configuration Assistant (Agent on 64bit Windows Server 2003, Grid Control on 32bit Windows XP) failed in running the last optional step. It hang for a long time, too long (a hour or so). After canceling this last step, checking the [configToolFailedCommands] showed the [oracle.sysman.emcp.agent.AgentPlugIn] was messing up the set-up.