Re: Connections hang indefinitely while taking a gin index's LWLock buffer_content lock

On Tue, Dec 4, 2018 at 8:01 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2018-11-10 17:42:16 -0800, Peter Geoghegan wrote:
> > On Wed, Nov 7, 2018 at 5:46 PM Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> > > Teodor: Do you think that the issue is fixable? It looks like there
> > > are serious issues with the design of 218f51584d5 to me. I don't think
> > > the general "there can't be any inserters at this subtree" thing works
> > > given that we have to couple buffer locks when moving right for other
> > > reasons. We call ginStepRight() within ginFinishSplit(), for reasons
> > > that date back to bug fix commit ac4ab97e from 2013 -- that detail is
> > > probably important, because it seems to be what breaks the subtree
> > > design (we don't delete in two phases or anything in GIN).
> >
> > Ping?
> >
> > This is a thorny problem, and I'd like to get your input soon. I
> > suspect that reverting 218f51584d5 may be the ultimate outcome, even
> > though it's a v10 feature.
>
> Teodor, any chance for a response here? It's not OK to commit something
> and then just not respond to bug-reports, especially when they're well
> diagnose and clearly point towards issues in a commit of yours.

Unfortunately, Teodor is unreachable at least till next week.

> Alexander, CCing you, perhaps you could point the thread out to Teodor?

I'll take a look at this issue.

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company