A note on the in-memory store (was: Re: [jira] Commented: (DERBY-2107) Move page latching out of the lock manager)

[Kristian Waagan <Kr...@Sun.COM>]

Mike Matrigali wrote:
> I am ok with moving latching out of the lockmanager, if it really is 
> necessary to get the performance you are looking for.  I had hoped that
> latching would remain a "service" provided by another module so that if 
> there are multiple store implementation they could share a single 
> latching implementation.  I assume changes to remove latching out of
> lock manage will break existing in progress work to do in memory store - 
> but I don't know for sure.
> 

Just want to point out that the work done on the in-memory store is 
brushed up to a state where it can be applied to trunk. It should be 
possible to test if a change in the latching code would break it.

One would have to hack the test harness a little to make it use the 
correct back-end. I might make a patch and upload it to DERBY-686, run 
suites.All and report on the results. I did try it once, but only ran a 
few tests.

If anyone else wants to have a go, please do so, as I will be busy and 
away for the whole next week (JavaPolis).



-- 
Kristian

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