Re: does wal archiving block the current client connection?

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On Fri, 19 May 2006, Simon Riggs wrote:

On Thu, 2006-05-18 at 10:08 -0700, Jeff Frost wrote:

May 18 08:00:18 discord postgres[20228]: [129-1] LOG:  archived transaction log file "00000001000000000000007F"
May 18 08:00:41 discord postgres[20573]: [254-1] LOG:  archived transaction log file "00000001000000000000007F"
May 18 08:00:41 discord postgres[20573]: [255-1] WARNING:  could not rename file "pg_xlog/archive_status/00000001000000000000007F.ready" to
May 18 08:00:41 discord postgres[20573]: [255-2]  "pg_xlog/archive_status/00000001000000000000007F.done": No such file or directory

I'm not clear how you can have two processes both issuing this message,
since it is only the archiver process that ever says this.

Do you have two archivers running on this system?
pid = 20229 and pid = 20573

Presumably pg_xlog/archive_status/00000001000000000000007F.done already
exists?

Are there two postmasters running (at all)?
Is there somehow an archiver process running from a previously shutdown
postmaster (somehow)?

Ah!! Good catch Simon! There are in fact two postmasters running on this system. The normal postmaster running in /var/lib/pgsql on port 5432 and this test postmaster running on port 55432. The 8.0.7 postmaster on port 5432 shows the following for it's archive_command though:

template1=# show archive_command;
 archive_command
-----------------
 unset
(1 row)

and the port 55432 postmaster shows:

template1=# show archive_command;
                   archive_command
------------------------------------------------------
 /usr/local/pgsql-8.1.3/bin/archive_test.sh "%p" "%f"
(1 row)

Do you think the postmaster on 5432 is trying to archive the other postmaster's WAL files somehow?

--
Jeff Frost, Owner 	<jeff@xxxxxxxxxxxxxxxxxxxxxx>
Frost Consulting, LLC 	http://www.frostconsultingllc.com/
Phone: 650-780-7908	FAX: 650-649-1954


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