ORA-00439: feature not enabled: Real Application Clusters


Relink the RAC to permit to start the instance, i.e.
make -f ins_rdbms.mk rac_on
make -f ins_rdbms.mk ioracle


error while loading shared libraries: libclntsh.so.11.1

error while loading shared libraries: libclntsh.so.11.1

Sometimes you may have a 32bit application which try to use the 64bit oracle client.
Solution : install oracle 32bit client and set oracle_home and other parameters accordingly.


how to root and install cyanogenmod on your samsung galaxy ace 2

1. Download root.zip and put it on a sdcard ( not on internal memory ). You can download it from here http://androidcentral.us/2014/01/root-galaxy-ace-2-on-android-4-1-2-jelly-bean/
2. Download cwm ( custom recovery ) from here http://forum.xda-developers.com/showthread.php?t=2141395  . Put it also on the sdcard
3. Download cyanogenmod 11 ( android 4.4 ) and gapps for android 4.4 ( please choose the pico one )  http://forum.xda-developers.com/showthread.php?t=2555021
4. Stop the phone (power off)
5. Press volume up + HOME + POWER .
6. Enter in stock recovery mode. Choose apply sdcard ... and then pick up root.zip
7. Again, choose apply sdcard ... and choose cwm zip archive
8. The recovery will be changed to cwm
9. wipe data
10. wipe cache ( and dalvik cache from advanced )
11. Install cyanogenmod zip and after that pico gapps for android 4.4
12. Reboot the phone





fusion io tuning for flash


Fusion-io provides an open source script to tune interconnects on the database nodes.

The ION tuner (iontuner) file makes the following changes:

Tuning Block Devices
 Sets the I/O scheduler to noop, which reduces latency and CPU usage when queuing I/O to the backend storage compared to the default scheduler, CFQ, which is tuned for traditional disk I/O.
 Sets the I/O request queue affinity to level 2, which forces I/O to complete on the same CPU where the I/O request was initiated.
 Disables disk entropy contribution.

IRQ Pinning
To minimize data transfer and synchronization throughout the system, I/O interrupts were handled on the socket local to their PCIe device. To provide the best results, the irqbalance daemon was disabled.
IRQs were pinned for each driver that handles interrupts for ION Accelerator device I/O as well as for the InfiniBand drivers that support the Oracle RAC private interconnect. Driver IRQs were identified in /proc/interrupts by the matching IRQ numbers to the driver prefix listed in the same row. The IRQs were distributed between the CPU cores within the
device’s local socket.





patch 19121549 is not applicable

Error : The opatch Applicable check failed.  The patch /tmp/19380115/19121549 is not applicable to /app/grid
Error:Patch Applicable check failed for /app/grid

                    chown -R oracle:oinstall  /tmp/19380115


has a disk HB, but no network HB, DHB has rcfg

11gR2 GI Node May not Join the Cluster After Private Network is Functional After Eviction due to Private Network Problem (Doc ID 1479380.1)


do not use ext4 for oracle database files