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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: 10.9 update
Date Thu, 24 May 2012 18:37:32 GMT
I am having some problems getting to JIRA, will update the issue when
I get online.

I now have an environment where I can reproduce DERBY-5780.  I am 
actively working on this one, and think I understand the problem.
The commits are working fine, but we destroy/abort on each identity
column insert and that abort is sync writing where it did not use
to due to the change for sequences.

I can either make there be an abortNoSync(), or change transactions
to indicate on creation whether the default behavior is to sync or
not.  I think the second option is the right way to go but may involve
some code rototil, so may have a fix this week, but more likely a tested
fix to trunk by next tuesday given the holiday.

On 5/23/2012 3:52 PM, Rick Hillegas wrote:
> I have created a 10.9 branch and built a release candidate. However, I
> do not expect to publish this candidate. Some late-breaking performance
> measurements show a large, unexpected throughput drop for concurrent
> users of identity columns. See DERBY-5471 and DERBY-5780. It is likely
> that we will want to address this regression before producing a new
> release. The fix, of course, will have to be ported to 10.9 now that the
> branch has been created.
> Please stand by...
> Thanks,
> -Rick

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