Re: Unreliable pg_stat_activity, Windows 2000, PostgreSQL 8.1 beta2 - Mailing list pgsql-bugs

From Jim C. Nasby
Subject Re: Unreliable pg_stat_activity, Windows 2000, PostgreSQL 8.1 beta2
Date
Msg-id 20051003220009.GP40138@pervasive.com
Whole thread Raw
In response to Unreliable pg_stat_activity, Windows 2000, PostgreSQL 8.1 beta2  ("Jean-Pierre Pelletier" <pelletier_32@sympatico.ca>)
List pgsql-bugs
How were you running 7.4? Under cygwin or on a different OS?

On Mon, Oct 03, 2005 at 12:21:09PM -0400, Jean-Pierre Pelletier wrote:
> Hi,
>
> pg_stat_activity sometimes list no connections or a number of connections
> much smaller than the number of postgres.exe processes.
>
> We also have these messages in our PostgreSQL log approximately
> 20 times a day.
>
> FATAL:  could not read from statistics collector pipe: No error
> FATAL:  could not write to statistics collector pipe: No connection could be
> made because the target machine actively refused it.
>
> or
>
> FATAL:  could not read from statistics collector pipe: No error
> LOG:  statistics collector process (PID 1628) was terminated by signal 1
>
> It looks like the pg_stat_activity problem and the messages become
> more frequent as the load/number of connection increases.
>
> We were having the same pg_stat_activity problem and the same messages
> with PostgreSQL 8.0.1 but didn't have the messages with PostgreSQL 7.4.1.
> we don't know if pg_stat_activity was ok with 7.4.1 because we weren't using
> it back then.
>
> We are using Windows 2000 Server, Service Pack 4.
>
> Thanks
> Jean-Pierre Pelletier
> e-djuster
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>       choose an index scan if your joining column's datatypes do not
>       match
>

--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461

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