Re: nested transactions - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: nested transactions
Date
Msg-id 200211290553.gAT5rQP20616@candle.pha.pa.us
Whole thread Raw
In response to Re: nested transactions  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: nested transactions
List pgsql-hackers
Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.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.

But that recycling requires the vacuum of every database in the system. 
Do people do that frequently enough?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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