On Tue, 2 May 2006, Tom Lane wrote:
Agreed. The pin has two functions:
- keep the page from being moved out of the bufmgr - no need anymore
- stop a vacuum from removing the page - no need anymore. We'll not stop
on a removable row anymore, so no need.
At the moment, backward scan returns to the page to walk left from there.
Backwards scan may break this whole concept; are you sure you've thought
it through?
I think so. The patch doesn't change the walk-left code. Do you have
something specific in mind?
- Heikki
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