From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
Subject: | Re: [HACKERS] Should *.backup files ever be removed from pg_xlog? |
Date: | 2005-06-09 04:16:15 |
Message-ID: | 200506090416.j594GFU06425@candle.pha.pa.us |
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Lists: | pgsql-hackers pgsql-patches |
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > I have fixed the code to properly remove *.backup files from the
> > /pg_xlog directory once they are archived.
>
> I do not actually think that this is a good idea. The .backup files are
> not large and they are pretty critical info --- so having multiple
> copies of them seems like a good idea. We don't auto-remove timeline
> history files either, for the same reason.
I realize the files are small, but the number of entries in the
directory might get pretty large. I am also worried about folks
realizing we are not cleaning out those directories and mucking in there
when they shouldn't --- I already got a private email asking why there
are so many files in there and can they be cleared out. In fact, the
archive_status/ directory also keeps *.done files for the backup files.
We knowe we have archived the *.backup files. Are these files any use
if we can't get the archive files restored?
OK, how about if we do this cleanup when we do pg_stop_backup() so we
delete any previous *.backup files, rather than do it as part of
checkpoint.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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