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From "Roland Beuker (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-260) Derby is not stable on multiprocessor or Hyperthreating architectures.
Date Wed, 11 May 2005 09:04:27 GMT
     [ http://issues.apache.org/jira/browse/DERBY-260?page=comments#action_64998 ]
     
Roland Beuker commented on DERBY-260:
-------------------------------------

Hello Sunitha,

I am arranging a Hyperthreating or Multiprocessor target to do some tests (the initial target
was from one of our customers...). I also got a reaction from developerworks:

http://www-128.ibm.com/developerworks/forums/dw_thread.jsp?forum=370&thread=80481

Both your and their reaction is that Cloudscape/Derby should work on a multi-processor target.
This could mean a problem with Hibernate instead of the Java database. At this moment I don't
have any specific details next to the fact that databases get/set statements where not working
right when Hyperthreating was enabled on the target platform. The problem disappeared when
I switched of Hyperthreating in the bios from the target platform.

Regards,

Roland Beuker

> Derby is not stable on multiprocessor or Hyperthreating architectures.
> ----------------------------------------------------------------------
>
>          Key: DERBY-260
>          URL: http://issues.apache.org/jira/browse/DERBY-260
>      Project: Derby
>         Type: Bug
>  Environment: P4 3GHz with Hyperthreating, 512 Mb, WIN2000 
>     Reporter: Roland Beuker

>
> Hello,
> I am using IBM Cloudscape Version 10.0 with Hibernate and it works great. But at the
time I was deploying my project on a target with a Hyperthreating CPU things went wrong (database
very unstable). It seems that Cloudscape is not functioning on multiprocessor or Hyperthreating
architectures. Has anyone some more information?
> Regards,
> Roland Beuker 

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