Hi - Was this ever solved? I'm currently experiencing this problem with V9.2.6
Any more info appreciated
I did not see the original post, but came across it now. Based on the original post it almost looks like there is a db lock on the pg_largeobject table and it couldn't access it. What time do you run your backup? We are on 9.2.6 with a H.A. distrubuted cluster and do not run into any issues with a nightly backup that starts at midnight. And as part of the backup we do a quick tabadmin ziplogs, tabadmin stop, tabadmin cleanup, tabadmin start, tabadmin cleanup, then a tabadmin backup to make sure everything is clean in terms of logs, sessions, etc. And it works like a charm.
Also, do you have sufficient disk space for dumping the output?