Missed the group... On Thu, Feb 25, 2010 at 12:34 AM, Gokulakannan Somasundaram < gokul...@gmail.com> wrote:
> > > On Thu, Feb 25, 2010 at 12:28 AM, Gokulakannan Somasundaram < > gokul...@gmail.com> wrote: > >> >> That doesn't work because when you split an index page any sequential >>> scan in progress will either see the same tuples twice or will miss >>> some tuples depending on where the new page is allocated. Vacuum has a >>> clever trick for solving this but it doesn't work for arbitrarily many >>> concurrent scans. >>> >>> Consider how the range scans are working today, while the page split >> happens. >> >> The Seq scan should follow the right sibling to do the seq scan. >> >> Gokul. >> >> > Actually thinking about what you suggested for a while, i think it should > be possible, because the Oracle Fast Full Index scan essentially scans the > index like that. I will try to think a way of doing that with Lehman and > Yao... > > Gokul. >
