[ZODB-Dev] minimizing the need for database packing

[Jim Fulton]

On Jan 2, 2008, at 1:30 PM, Dieter Maurer wrote:

> Jim Fulton wrote at 2007-12-29 16:06 -0500:
>> ...
>>> If you are at it: I think the lock which protects the "finish" test
>>> is hold too long. Currently, it is just release for a very short  
>>> time
>>> and then immeadiately reacquired. It should be safe to release it
>>> immediately after the "finish" test has failed.
>>
>>
>> I don't know what you are referring to. Could you be more specific?
>
> The old "pack" code acquires the "commit" lock at the start
> of the "copyRest" (copy transactions after pack time) phase
> and releases it only every 20 "copyOne" calls for the duration
> of one "copyOne".


OK. I don't know what you mean by the "finish test".

As I mentioned, the new packing algorithm holds the commit lock much  
less than the old one does.

Jim

--
Jim Fulton
Zope Corporation