Re: important Re: [HACKERS] Open 6.5 items

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: ZEUGSWETTER Andreas IZ5 <Andreas(dot)Zeugswetter(at)telecom(dot)at>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: important Re: [HACKERS] Open 6.5 items
Date: 1999-06-17 16:12:10
Message-ID: 199906171612.MAA27568@candle.pha.pa.us
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> Hiroshi wrote:
> > Ole Gjerde who provided the patch for current implementation of
> > mdtruncate() sayz.
> > "First, please reverse my patch to mdtruncate() in md.c as soon as
> > possible. It does not work properly in some cases."
> >
> > I also recommend to reverse his patch to mdtruncate().
> >
> > Though we could not shrink segmented relations by old implementation
> > the result by vacuum would never be inconsistent(?).
> >
> > I think we don't have enough time to fix this.
> >
> If there is no fix for vacuum, I suggest to change the filesize before
> splitting
> back to just below 2 Gb (2Gb - 8k). Else vacuum will only work for tables
> up to 1 Gb, and it did work up to 2 Gb before.
>
> I am the one who suggested 1 Gb, so I had my eye on this issue.
> I still think 1 Gb is good for various reasons, but only if vacuum works.

This is where we dropped the ball. We should have made this recommended
change before 6.5.

--
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