From: Tom Lane <tgl@sss.pgh.pa.us>
To: sveera <sveera@oration.com>
cc: pgsql-admin@postgresql.org
Subject: Re: pg_dump: Error message from server: lost synchronization with
 server: got messag e type "d",
In-reply-to: <1435069522258-5854831.post@n5.nabble.com>
References: <1435069522258-5854831.post@n5.nabble.com>
Comments: In-reply-to sveera <sveera@oration.com>
 message dated "Tue, 23 Jun 2015 07:25:22 -0700"
Date: Tue, 23 Jun 2015 10:37:03 -0400
Message-ID: <2018.1435070223@sss.pgh.pa.us>
Precedence: bulk
Sender: pgsql-admin-owner@postgresql.org

sveera <sveera@oration.com> writes:
> I am trying to backup  a database  products with pg_Dump. The total size of
> the database is 1.6 gb. One of the table in the database is product_image
> which is 1gb in size. When I run the pg_dump on the database the database
> backup fails with this error.

> ##pg_dump: Dumping the contents of table "product_image" failed: 
> PQgetCopyData() failed.
> pg_dump: Error message from server: lost synchronization with server: 
> got message type "d", length 6036499
> pg_dump: The command was: COPY public.product_image (id, username, 
> projectid, session, filename, filetype, filesize, filedata, uploadedon,
> "timestamp") T

Hm.  Given that the message type and length seem perfectly reasonable,
I suspect this must actually represent an out-of-memory condition within
pg_dump (*not* on the server end).  But you'd have to be running it on a
toy box, or with a rather silly ulimit, for 6MB to be a problem...

			regards, tom lane


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