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From "Mike Matrigali (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-465) Embedded Derby-PointBase comparison
Date Wed, 20 Jul 2005 18:21:54 GMT
    [ http://issues.apache.org/jira/browse/DERBY-465?page=comments#action_12316262 ] 

Mike Matrigali commented on DERBY-465:

note that the results of the select * tests posted at http://jamie.ideasasylum.com/notebook/index.php?id=4,
show 50,000 row select of same table
you are using takes 375 ms. on a slightly slower machine.  There is definitely something strange
going on with your results.  I have read over 
the .java files you posted and nothing jumps out at me.  I recommend debugging the single
user derby select test, verify number of rows and 
that you aren't missing any errors.  

> Embedded Derby-PointBase comparison
> -----------------------------------
>          Key: DERBY-465
>          URL: http://issues.apache.org/jira/browse/DERBY-465
>      Project: Derby
>         Type: Wish
>   Components: Test
>     Versions:,
>  Environment: Windows Server 2003, 4 processors, summary CPU 3.00 Ghz, RAM 1 Gb
>     Reporter: Peter Kovgan
>  Attachments: Benchmarks_info_independent.doc, DBOperations.java, Multithreading-access
read.doc, User.java, derby-optimization.doc, derby-pb1.doc
> I have tested 4 major embedded DB.
> I have found that major disadvantage of Derby is 
> 1)low insert speed and 
> 2)significant performance degradation in select, update, delete  operation speed starting
from some table size.
> PointBase in comparison has not such degradation.
> It will be better if you improve your product.
> Good luck and thank you.

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