Blog1s

I was troubleshooting some Windows hangs on my Desktop system running Windows 8 and enabled driver verifier. Today when I tried to start VirtualBox it failed with this error message. Failed to load VMMR0.r0 (VERR_LDR_MISMATCH_NATIVE) Most of the online forums were asking to reinstall VirtualBox to fix the issue. But one of the thread mentioned that it was being caused by Windows Driver Verifier. I disabled it, restarted Windows and VirtualBox worked like a charm. Didn’t have time to do more research as i quickly wanted to test something. May be we can skip some particular stuff from Driver Verifier and VirutalBox can then work. ...

Few months ago I contributed a chapter (on Monitoring, Troubleshooting and Performance tuning) to a GoldenGate book on Oracle Press that Robert Freeman was authoring. Thought of posting a small update that the book is now out. My name doesn’t appear on the main page but you will see it in the Acknowledgements section Below is a screenshot taken from Amazon preview . You may want to grab a copy if you are using/planning to use Oracle GoldenGate 11g. ...

So there is a new toy in the market for database geeks : Oracle has released database 12c. Every social platform is abuzz with the 12c activity. So thought that I should also complete the ritual In this post Aman has already summed up many important links. Maria Colgan has posted some useful links here. And here is a link to a slidedeck about Upgrading and Migrating to 12c. Happy 12c’ing ! ...

Yesterday I was configuring EM 12c for a Sun Super Cluster system. There were a total of 4 LDOMs where I needed to deploy the agent (Setup –> Add targets –> Add targets manually). Out of these 4 everything went fine for 2 LDOMs but for the other two it failed with an error message. It didn’t give much details on the EM screen but rather gave a message to try to secure/start the agent manually. When I tried to do that manually the secure agent part worked fine but the start agent command failed with the following error message: ...

Just a quick note about change in the way the compute nodes are patched starting from version 11.2.3.1.1. For earlier versions Oracle provided the minimal pack for patching the compute nodes. Starting with version 11.2.3.1.1 Oracle has discontinued the minimal pack and the updates to compute nodes are done via Unbreakable Linux Network (ULN). Now there are three ways to update the compute nodes: 1) You have internet access on the Compute nodes. In this case you can download patch 13741363, complete the one time setup and start the update. ...