Re: Oracle Myths

Niall Litchfield wrote:

> Suggested list to be added to, deleted from etc
>
> Store your segments in one extent for optimum performance.
> Space in an index is never reused.
> Full table scans are always bad: use the index.
> Seperate tables and indexes for performance reasons.
> You should always backup the online redo logs to avoid data loss.
> Buffer cache hit ratio should be as high as possible preferably greater than
> 90%.(from the java tool we use developed in house)
> Library Cache hit ratio should be greater than 99% if it isn't increase the
> size of the shared pool.(ditto!)
> Smallest table should be the driving table for hash joins.
> PCTIncrease should be as small as possible but non-zero to minimize
> tablespace fragmentation.1% is a good value (from my OCP course notes though
> not necessarily given by the tutor!)
>
> --
> Niall Litchfield
> Oracle DBA
> Audit Commission UK
> *****************************************
> Please include version and platform
> and SQL where applicable
> It makes life easier and increases the
> likelihood of a good answer
>
> ******************************************

Thanks. I am going to get on the first one and see what I can determine.

Daniel Morgan Received on Wed May 15 2002 - 11:11:17 CDT