Thread: large object does not exist after pg_migrator
Hi -
After what seemed to be a normal successful pg_migrator migration from 8.3.7 to 8.4.0, in either link or copy mode, vacuumlo fails on both our production and qa databases:
Jul 1 11:17:03 db2 postgres[9321]: [14-1] LOG: duration: 175.563 ms statement: DELETE FROM vacuum_l WHERE lo IN (SELECT "xml_data" FROM "public"."xml_user")
Jul 1 11:17:03 db2 postgres[9321]: [15-1] ERROR: large object 17919608 does not exist
Jul 1 11:17:03 db2 postgres[9321]: [16-1] ERROR: current transaction is aborted, commands ignored until end of transaction block
I migrated our qa database using pg_dump/pg_restore and vacuumlo has no problem with it. When I try querying the two databases for large objects manually I see the same error in the one that was migrated with pg_migrator:
select loread(lo_open(xml_data,262144),1073741819) from xml_user where id = '10837246';
ERROR: large object 24696063 does not exist
SQL state: 42704
I can also see that the pg_largeobject table is different, in the pg_restore version the Rows (estimated) is 316286 and Rows (counted) is the same, in the pg_migrator version the Rows (counted) is only 180507.
Any advice on what I might look for to try and track down this problem? pg_restore on our production database takes too long so it would be really nice to use pg_migrator instead.
Thanks,
Jamie
Hi -
This is probably more helpful - the pg_largeobject table only changed after vacuumlo, not before. When comparing pre- and post- pg_migrator databases (no vacuum or vacuumlo):
select * from pg_largeobject where loid = '24696063';
in the pre- there are three rows, having pageno 0 through 3, in the post- database there are no results.
Thanks for any advice,
Jamie
On Mon, Jul 13, 2009 at 2:13 PM, Jamie Fox <jfox@directcommerce.com> wrote:
Hi -After what seemed to be a normal successful pg_migrator migration from 8.3.7 to 8.4.0, in either link or copy mode, vacuumlo fails on both our production and qa databases:Jul 1 11:17:03 db2 postgres[9321]: [14-1] LOG: duration: 175.563 ms statement: DELETE FROM vacuum_l WHERE lo IN (SELECT "xml_data" FROM "public"."xml_user")Jul 1 11:17:03 db2 postgres[9321]: [15-1] ERROR: large object 17919608 does not existJul 1 11:17:03 db2 postgres[9321]: [16-1] ERROR: current transaction is aborted, commands ignored until end of transaction blockI migrated our qa database using pg_dump/pg_restore and vacuumlo has no problem with it. When I try querying the two databases for large objects manually I see the same error in the one that was migrated with pg_migrator:select loread(lo_open(xml_data,262144),1073741819) from xml_user where id = '10837246';ERROR: large object 24696063 does not existSQL state: 42704I can also see that the pg_largeobject table is different, in the pg_restore version the Rows (estimated) is 316286 and Rows (counted) is the same, in the pg_migrator version the Rows (counted) is only 180507.Any advice on what I might look for to try and track down this problem? pg_restore on our production database takes too long so it would be really nice to use pg_migrator instead.Thanks,Jamie