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Re: nested transactions

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Manfred Koizar <mkoi-pg(at)aon(dot)at>,PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: nested transactions
Date: 2002-11-29 03:27:32
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Lists: pgsql-hackers
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> It only becomes better if we can throw away that file (or contents) when
> the transaction completes and we have marked all the subtransactions as
> completed.  We can't compress pg_clog if we store the parent info in
> there.

But we already have a recycling mechanism for pg_clog.  AFAICS,
creating a parallel log file with a separate recycling mechanism is
a study in wasted effort.

			regards, tom lane

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