Re: pgsql: Have test_fsync honor -f filename argument.

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От Qingqing Zhou
Тема Re: pgsql: Have test_fsync honor -f filename argument.
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Msg-id dle3dv$1g9r$1@news.hub.org
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Ответ на pgsql: Have test_fsync honor -f filename argument.  (momjian@svr1.postgresql.org (Bruce Momjian))
Ответы Re: pgsql: Have test_fsync honor -f filename argument.  (Bruce Momjian <pgman@candle.pha.pa.us>)
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"Bruce Momjian" <momjian@svr1.postgresql.org> wrote
> -----------
> Have test_fsync honor -f filename argument.
>

The patch may forget to change the error message (Also, it would be better
to append a '\n' in die() function). Another possible problem of this test
is that it pickups the "/var/tmp". OS may have IO optimization on temporary
directories, which will affect the confidence of the results.

Example:
---
$#./test_fsync -f $HOME/test.out
Simple write timing:
        write                    4.265149
$#./test_fsync -f /var/tmp/test.out
Simple write timing:
        write                    0.018404
$#./test_fsync -f /tmp/test.out
Simple write timing:
        write                    0.018511
---

Regards,
Qingqing



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