Re: Cleaning up unreferenced table files - Mailing list pgsql-patches

From Bruce Momjian
Subject Re: Cleaning up unreferenced table files
Date
Msg-id 200505050325.j453P7G12279@candle.pha.pa.us
Whole thread Raw
In response to Re: Cleaning up unreferenced table files  (Simon Riggs <simon@2ndquadrant.com>)
List pgsql-patches
FYI, his patch is in CVS and now only _reports_ unreferenced files, and
it happens on recovery and normal startup.

---------------------------------------------------------------------------

Simon Riggs wrote:
> Heikki,
>
> Good patch.
>
> ...The patch makes no mention of temporary files, which are left there
> after a crash.
>
> Temp files are only removed on a normal startup, whereas the patch
> invokes removal on both normal startup and crash recovery. That doesn't
> make much sense...
>
> Also, temp file deletion happens in the postmaster, not at the end of
> recovery in xlog.c.
>
> Could we rationalise those two? One place, one action for both?
>
> I'd rather have this also as an administrator command rather than as
> something automatically run after crash recovery. That way I have my
> debugging opportunity, but the admin can remove them without restarting
> the server.
>
> Same code, just a Function instead...
>
> Best Regards, Simon Riggs
>
> reference from fd.c: (this is not a patch)
>
> /*
>  * Remove temporary files left over from a prior postmaster session
>  *
>  * This should be called during postmaster startup.  It will forcibly
>  * remove any leftover files created by OpenTemporaryFile.
>  *
>  * NOTE: we could, but don't, call this during a post-backend-crash
> restart
>  * cycle.  The argument for not doing it is that someone might want to
> examine
>  * the temp files for debugging purposes.  This does however mean that
>  * OpenTemporaryFile had better allow for collision with an existing
> temp
>  * file name.
>  */
> void
> RemovePgTempFiles(void)
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

--
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  pgman@candle.pha.pa.us               |  (610) 359-1001
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