| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Kurt Roeckx <Q(at)ping(dot)be> |
| Cc: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Timing of 'SELECT 1' |
| Date: | 2004-03-10 20:04:50 |
| Message-ID: | 9258.1078949090@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Kurt Roeckx <Q(at)ping(dot)be> writes:
> If I do a query on localhost with lots of data, I get a small
> time in the log, if I do it over a slow link the time get higher.
> It changes from 1 second to 2 minutes or something.
> So I think it's until the client has received the data.
It'll at least be until the backend has been able to send the data.
However, for a small amount of retrieved data, I doubt the kernel
will make the backend wait at the send() --- if there even is one
before the log entry is made.
regards, tom lane
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