Author Archives: Ronny Egner

Your private tape library – a pre-configured virtual machine with MHVTL and iSCSI export capability

I am using MHVTL for quite a while now. MHVTL emulates a configurable tape library and stores the data in the file system. Normally when testing i am installing the backup software directly where MHVTL runs. But that only works … Continue reading

Posted in Networker | 7 Comments

RMAN-10008/RMAN-04006: error from auxiliary database: ORA-12537: TNS:connection closed

Just a short note: When doing a “duplicate from active database” with a larger amount of channels you need to set the PROCESSES setting in your parameter file to a reasonable high value (i.e. 500). Otherwise the duplicate will fail … Continue reading

Posted in Oracle in general | Leave a comment

Oracle announces support for 11g R2 databases on OEL 6

Oracle just released a statement which states the immediate availability and support using Oracle database 11g R2 with Oracle Enterprise Linux 6.   You can read the official announce here.

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PRVF-5300: Failed to retrieve active version for CRS on this node when installing 11.2.0.2 DB on 11.2.0.3.0 Grid Infrastructure

I just played with 11.2.0.3.0 patchset on Linux x86_64 (in my testcase Oracle Enterprise Linux 5.6) and tried to install a 11.2.0.2.0 database on it. It fails with: PRVF-5300: Failed to retrieve active version for CRS on this node The … Continue reading

Posted in Oracle in general | 9 Comments

INFO: task blocked for more than 120 seconds.

When running some high workloads on UEK kernels on systems with a lot of memory you might see the following errors in /var/log/messages:   INFO: task bonnie++:31785 blocked for more than 120 seconds. “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” disables this message. … Continue reading

Posted in Oracle in general | 23 Comments

11.2.0.3.0 is out

Since almost two week Oracle released Oracle database patchset 11.2.0.3.0.   I am a little bit late with this news. Martin Bach already  posted a lot of stuff about this so let me link to his guides: – Release Accouncement … Continue reading

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ext4 file systems and the 16 TB limit – how to *solve* it

creating and handling ext4 file systems larger > 16 TB Continue reading

Posted in UNIX | 28 Comments

When patching is not enough: Oracle 11g R2 on Solaris SPARC requires fresh base installation of Solaris 10 U6

While checking MOS i found an interesting note (ID 964976.1) which states: Applying a kernel patch or a Solaris patch bundle is not the equivalent to installing the specific Solaris 10 “update 6” image. 11gR2 RDBMS software is only certified … Continue reading

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Installing a paravirtualized guest using PXE and Kickstart on Oracle VM 2.2

The past few days i started working on Oracle VM 2.2.1. The task i tried to accomplish was to install Oracle Enterprise Linux in a para-virtualized guest via PXE and Kickstart. Sounds not too complicated, does it? If you are … Continue reading

Posted in Oracle VM 2.2 | Leave a comment

11.2.0.2: two critical bugs

Just found two nice bugs in Metalink for 11.2.0.2.x: Bug #1 (10205230) [Note ID 1318986.1]: ORA-00600 or DATA CORRUPTION in RAC Environments when using shutdown mode “normal”, “transactional” or “immediate” on 11.2.0.2.1 and 11.2.0.2.0.   This Bug is fixed in … Continue reading

Posted in Oracle in general | 1 Comment