Re: Preventing deadlock on parallel backup

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Lucas <lucas75(at)gmail(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Preventing deadlock on parallel backup
Date: 2016-09-08 21:34:19
Message-ID: 6063.1473370459@sss.pgh.pa.us
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Lucas <lucas75(at)gmail(dot)com> writes:
> The queue jumping logic can not use the distributed transaction id?

If we had such a thing as a distributed transaction id, maybe the
answer could be yes. We don't.

I did wonder whether using a shared snapshot might be a workable proxy
for that, but haven't pursued it.

regards, tom lane

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