Re: CIC and deadlocks

Tom Lane wrote:
> "Pavan Deolasee" <pavan(dot)deolasee(at)gmail(dot)com> writes:
>
> Good point. I'm envisioning a procarray.c function along the
> lines of
> bool TransactionHasSnapshot(xid)
> which returns true if the xid is currently listed in PGPROC
> and has a nonzero xmin. CIC's cleanup wait loop would check
> this and ignore the xid if it returns false. Your point means
> that this function would have to take exclusive not shared lock
> while scanning the procarray, which is kind of annoying, but
> it seems not fatal since CIC isn't done all that frequently.
>

Tom,

If you haven't finished this yet, would you like me to work
on this ? If I do it, I would mostly follow the path you
suggested above, unless I run into something else.

Thanks,
Pavan

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