Re: Deadlock condition in current sources

"Mikheev, Vadim" <vmikheev(at)SECTORBASE(dot)COM> writes:
> Checkpoint' undo is not used currently so just comment out GetUndoRecPtr
> call in CreateCheckPoint - we'll find solution later.

I thought about that, but figured you'd object ;-)

One possibility is to do something you had recommended awhile back for
other reasons: add a spinlock to each PROC structure and use the
spinlock, rather than SInvalLock, to protect setting and reading of
xmin, logRec, and related fields. I haven't finished working out all
the details, though, and this seems like a rather large change to make
at this late stage of beta. Comments?

regards, tom lane