Tag Archives: database

ORA-29283: invalid file operation using UTL_FILE.FREMOVE

I’ve been breaking my head over a problem I had with the UTL_FILE.FREMOVE command trying to remove a file created by another (not oracle) process. On *nix command line, logged in as user oracle (same as database) I’m able to … Continue reading

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ORA-600 [kkpo_rcinfo_defstg:objnotfound] on a 11.2 RAC instance

RECOMMENDATION: Set the deferred_segment_creation parameter to FALSE for 11.2 RAC databases! Recently our monitoring picked up an ORA-600 from the alertlog of one of our 11.2 RAC instances. ORA-00600: internal error code, arguments: [kkpo_rcinfo_defstg:objnotfound],[87421], [], [], [], [], [], [], … Continue reading

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ORA-19809: limit exceeded for recovery files

In our cloning procedures we use the RMAN “DUPLICATE” command for duplicating databases. This all went fine for a long time until one moment we start getting errors during the duplication process (from the point where media recovery gets started). … Continue reading

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Determine versions of connected Oracle clients

Last week I was trying to find a way to determine the version of the Oracle clients that are connected/connecting to databases from these databases. We cannot connect to each application server to figure out the used version and certainly … Continue reading

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Cryptographic flaws in Oracle Database authentication protocol

Recently a security researcher (Esteban Martinez Fayo) made the world aware of a problem with the O5LOGON Oracle database authentication protocol (used in 11g – 11.1 & 11.2). This problem, known as CVE-2012-3137, makes it relatively simple for attackers to … Continue reading

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Linking Oracle BBED in 11g

Warning: I use the Oracle Block Browser and Edit tool (bbed) for studying the internal structure of database blocks. Be very careful using the tool, you can destroy blocks using this tool so make sure you know what you are … Continue reading

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Oracle Database Appliance – Installing Patch Bundle 2.2

On 17 April 2012 ODA patch bundle 2.2.0.0.0 was released, which includes an Linux kernel upgrade (2.6.18-194.32.1.0.1.e15 to 2.6.32-300.11.1.el5uek – Unbreakable Enterprise Kernel), Oracle Grid Infrastructure patchset 11.2.0.3.2 and Oracle RDBMS patchset 11.2.0.3.2. Oracle made the installation of various parts … Continue reading

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Oracle Database – 11.1.0.7 in extended support

As of 1 September 2012 Oracle database release 11.1 (terminal release 11.1.0.7) will be in Extended Support. Here is list of some database releases with start dates for extended support and sustaining support: Release Extended Support Start Sustaining Support Start … Continue reading

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Oracle RAC – granting SYSDBA or SYSOPER is instance specific

The default location for the password file is $ORACLE_HOME/dbs which in most cases (if you don’t have your ORACLE_HOME on a shared disk) is on a non-shared filesystem. Whenever you grant SYSDBA or SYSOPER to a database user Oracle will … Continue reading

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ORA-00245: control file backup operation failed

A snapshot controlfile is a read consistent copy of a database controlfile which RMAN creates because the controlfile is changed constantly. As of Oracle 11.2 (11.2.0.2 to more precise) the snapshot controlfile must be on a location shared by all … Continue reading

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