Re: [HACKERS] ERROR: WaitOnLock: error on wakeup - Aborting this transaction

> Tatsuo Ishii wrote:
> >
> > > > I get above message from the backend while trying to update same raw
> > > > from different transactions (I guess). Is this normal?
> >
> > My sessions look like:
> >
> > begin;
> > update t set a = 1 where c = 1;
> > select * from t where c = 1;
> > end;
>
> Ops. Do you have indices over table t?
> Btree-s are still using page-level locking and don't release
> locks when leave index page to fetch row from relation.
> Seems that this causes deadlocks more often than I thought -:(
>
> Marc? I can fix this today and I'll be very careful...
> Ok?

If you don't, seems like our MVCC isn't going to be much good.

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