When you want to delete an ASM diskgroup, you might encounter the following error:
ORA-15027: active use of diskgroup “DATA” precludes its dismount Continue reading
I was preparing some fresh installed OEL5.5 machines for database software installation, but after running ‘yum install oracle-validated‘, the OUI did not pass the prerequisites on two packages. It seems it did not install unixODBC-devel x86_64 and libaio-devel x86_64.
Their Linux may be unbreakable, but their ‘oracle-validated’ package on the public yum server seemed to be broken. Continue reading
I finally found how to add birthdays from my Google contacts to Google calendar. It is deeply hidden within Google calendar, whereas I would expect this to be a simple check-box setting.
Google calendar contact birthday
Many people will use the WebLogic’s NodeManager to use the start script for starting Managed Servers:
The NodeManager will start the Managed Server using the script and monitor the Managed Server when it fails.
One of the mistakes people can make is creating their own start script and start the Managed Server using ‘nohup &’ within this script: Metalink [ID 984122.1] and [ID 861098.1]. The script will finish and the server keeps running, but the NodeManager thinks the Managed Server has failed… Continue reading
Oracle has released it’s first patch set for Oracle Database 11g Release 2 (188.8.131.52).
See the README at Oracle® Database Patch Set Notes 11g Release 2 (184.108.40.206) Patch Set 1 and Metalink Note ID 1189783.1 at Important Changes to Oracle Database Patch Sets Starting With 220.127.116.11 for more information.
— Checked for relevance on Januari 21, 2017
The Oracle Database version compatibility matrix and version support status matrix are almost mandatory when installing or upgrading clients or servers.
For information about patches, go here: Oracle database patches for Linux and Windows (on Metalink).
For announcements of security fixes, go to Critical Patch Updates, Security Alerts and Third Party Bulletin.
Oracle Database client / server version compatibility matrix
Oracle calls this Client / Server Interoperability Support, Note ID 207303.1
Oracle Database version release support status matrix
Oracle calls this the Database Releases Support Status Summary, Note ID 161818.1
You will be redirected to Oracle Support and you must be registered to gain access to the pages. I did not include the matrices, because these change over time.
Oracle Information about Windows 32 / 64 bit database and client versions
Certification Information for Oracle Database on Microsoft Windows x64 (64-bit), Doc ID 1307195.1
I knew in Oracle 11g with Automatic Memory Management (AMM), the database was able to give unused memory back to the OS, controlled by MEMORY_TARGET and MEMORY_MAX_TARGET.
This mechanism is present in 11g since day 1 (in 2007), but I never actually played with it.
MEMORY_TARGET and MEMORY_MAX_TARGET
The Oracle documents state the following:
MEMORY_TARGET specifies the Oracle system-wide usable memory.
MEMORY_MAX_TARGET (…) decide on a maximum amount of memory that you would want to allocate to the database for the foreseeable future.
So my guess is, MEMORY_MAX_TARGET (static) is the maximum you can set MEMORY_TARGET (dynamic) to. A couple of days ago, I wanted to experiment a bit with these memory settings.
I have been trying to import a private key into ConnectBot for Android.
The key I’m using is working fine when using Putty, but does not work for ConnectBot.
To make it work for ConnectBot, you need to have a OpenSSH version of this file.
Luckily one can also use PuTTYgen to create an OpenSSH key.
In Puttygen, do the following:
- Load the private key: [File] -> [Load Private Key] (*.ppk)
- Enter passphrase if applicable
- Goto: [Conversions] -> [Export OpenSSH key] and save
In this blog post I will talk about the basic workings of Automatic Undo Management, which can cause ORA-01555 and ORA-30036 issues.
The scope is Automatic Undo Management used in 10g and 11g, but has to be explicitly set for 9i (UNDO_MANAGEMENT = AUTO). Manual Undo Management is out of scope for this blog.
The Undo tablespace is a normal tablespace like any other, but only Oracle is controlling what is happening inside it.
The Undo tablespace is used for several features: ROLLBACK, READ CONSISTENCY and FLASHBACK technology. Continue reading
I have been moving sites and urls around and found this page to be very handy to implement friendly http 301 redirects.