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From "Peter Kovgan (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-465) Embedded Derby-PointBase comparison
Date Sun, 24 Jul 2005 06:53:46 GMT
    [ http://issues.apache.org/jira/browse/DERBY-465?page=comments#action_12316609 ] 

Peter Kovgan commented on DERBY-465:
------------------------------------

Hi Mike!
Your comments and help are very important for me and it seems we are coming together to similar
results.
Thank you.
1.	Right now I discovered lock timeout errors on PB on multi-user-write test  and I'm planning
provide more precise tests of PB and recheck PB read and write.
2.	Also Commit() probably must be done on every transaction to minimize lock time in multi-user
test
3.	May be I also will check several debugging options in both DB to be sure results are right.

After tests I'll send source code of multi-user test as well as description to clarify results.





> Embedded Derby-PointBase comparison
> -----------------------------------
>
>          Key: DERBY-465
>          URL: http://issues.apache.org/jira/browse/DERBY-465
>      Project: Derby
>         Type: Wish
>   Components: Test
>     Versions: 10.0.2.1, 10.0.2.0
>  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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