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Comparison of Oracle Drivers Expand / Collapse
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Posted Tuesday, July 06, 2004 1:56 PM
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Comments posted to this topic are about the content posted at http://www.sqlservercentral.com/columnists/hji/compar


Post #124949
Posted Tuesday, July 20, 2004 9:59 PM
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Great Article

It is one of those things i have always wondered but never had a chance to test,

Often i have to extract manipulate and transform information from Oracle into SQL server,

 

It is good to know which driver is fastest, i always assumed the Oracle driver on OraXXX would be the fastest but you have proven it otherwise,

 

thanks again !




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Post #127321
Posted Wednesday, July 21, 2004 9:42 AM
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Great article, but BTW, flushing the shared pool in oracle does not clear the buffer cache with the data blocks in them.

It only clears the SQL statement from the shared pool.  The SQL statement will be reparsed the next time you run, but typically only takes a fraction of a second.

Oracle 10g will allow you to clear the actual buffer pools.

Post #127421
Posted Saturday, July 24, 2004 1:04 PM
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This is a very good test. We recently moved to Oracle 9i from Oracle 8i and we have been using Microsoft ODBC for Oracle. I was not sure if I could continue to use the same. But my application vendor suggested that I should go for Oracle for OraHome92 since we could be sure it could handle the 9i features though I am not sure if my Microsoft ODBC for Oracle could do the same. May be someone could post a reply on this one.

Anyway the test is an eye-opener for lot of folks like me.

Thanks,

Suri

 




Post #128048
Posted Friday, July 30, 2004 12:48 AM
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I do not agree with results reported in this article because some versions of Oracle ODBC drivers had performance issues.

We found that Oracle in OraHome v .9.2.0.1 was 3-4 times slower than v.9.2.0.6

So, there's practically no performance difference between all reported drivers, but there's great difference in functional features. Oracle drivers are "more native" and therefore have much more features

Post #129207
Posted Thursday, July 21, 2005 11:30 AM
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Suri,

You should use Oracle for OracleHome92 as the older version has been desupported, and the older version does have some issues with the newer NLS character sets. There are no specific 9i "features" that depend on the later ODBC driver, but the newer one certainly has rectified bugs. The difference between the MS ODBC and Oracle ODBC drivers has always been this: The Oracle ones understand Oracle specifics such as synonyms, etc, while the MS ODBC drivers are more generic.

John Kanagaraj

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