Monthly Archives: December 2009

Top Ten Performance Mistakes Found in Oracle Systems.

Here’s the oracle top 10 performance mistakes found in oracle database systems.

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Q: How to minimize log file sync?

Log file sync waits are associated with Redo data which has to be written to disk. There are a number of means with which you can combat this wait event.

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What software is necessary for Oracle RAC? Does it have a separate installation CD to order?

Oracle Real Application Clusters is an option of Oracle Database andtherefore part of the Oracle Database CD.

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Giving Access to run AWR/ADDM

You may want to allow non-dba users to run AWR reports (I wouldn’t, but my client may). Here’s how to do it.

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Converting from RAC to single instance.

Oracle does not support conversion of a RAC database to a single instance, or at least does not supply any tool to perform this change as of oracle 10g.

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How to Manually Convert Single Instance to RAC on Unix.

There is now the rconfig utility in 10g which allows you to convert a single instance to a RAC. However, you can still do this manually.

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Memory on windows using oracle.

Memory on windows using oracle.

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What (and what not) to monitor.

There’s monitoring and there’s monitoring. When you’ve deployed an oracle database system, you will either have a DBA in to run it or have outsourced to a reputable company, to perform the tasks required. If you’ve a DBA, you’ve vetted … Continue reading

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Splitting multiple column range partitioned tables.

There was some confusion in splitting multiple column partitioned tables sometimes, and you need to grasp the concept of how oracle manages partitions to understand this.

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Create a complex partitioned table.

Creating partitioned tables can be very time consuming, which is where the tools like Toad and EM come in handy. However, if you don’t have either, what’s the simpliest way to create a partitioned table ?

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