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Re: Scaling up deferred unique checks and the after trigger queue - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Scaling up deferred unique checks and the after trigger queue
Date
Msg-id 603c8f070910191002t5771f96cqd3a9b2050f70b1a4@mail.gmail.com
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In response to Re: Scaling up deferred unique checks and the after trigger queue  (Dean Rasheed <dean.a.rasheed@googlemail.com>)
Responses Re: Scaling up deferred unique checks and the after trigger queue
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On Mon, Oct 19, 2009 at 12:48 PM, Dean Rasheed
<dean.a.rasheed@googlemail.com> wrote:
> This is a WIP patch to replace the after-trigger queues with TID bitmaps
> to prevent them from using excessive amounts of memory. Each round of
> trigger executions is a modified bitmap heap scan.

If the bitmap becomes lossy, how do you preserve the correct semantics?

...Robert

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