Pgdump error "invalid page header in block"

On 03/03/11 11:47 PM, tuanhoanganh wrote:

Yesterday, I had some problem with postgresql 9.0.2. Today i backup
postgres and has error

pg_dump: reading dependency data
pg_dump: SQL command failed
pg_dump: Error message from server: ERROR: invalid page header in
block 299 of relation "pg_depend_depender_index"
pg_dump: The command was: SELECT classid, objid, refclassid, refobjid,
deptype FROM pg_depend WHERE deptype != 'p' ORDER BY 1,2
pg_dump: *** aborted because of error

Is there any way to fix it.

the bad news is, this generally indicates a hardware problem caused disk
data to be corrupted. this could be a memory error corrupting cache,
or the disk channel or drive. Or, it could be a issue with the OS file
system, failing under heavy concurrent random writes. Or it could
be a rare bug in postgres, but I've not heard of any block corruptions
in a long long time.

the good news is, its an index, and you can just reindex that table.
thats a system table. as the postgres user,

reindex index pg_depend_depender_index;

On Mar 4, 2011, at 1:17 PM, tuanhoanganh wrote:

pg_dump: reading dependency data
pg_dump: SQL command failed
pg_dump: Error message from server: ERROR: invalid page header in block 299 of relation "pg_depend_depender_index"
pg_dump: The command was: SELECT classid, objid, refclassid, refobjid, deptype FROM pg_depend WHERE deptype != 'p' ORDER BY 1,2
pg_dump: *** aborted because of error

reindexdb -s <database name>

will resolve the issue.

Thanks & Regards,
Vibhor Kumar
EnterpriseDB Corporation
The Enterprise PostgreSQL Company
vibhor.kumar@enterprisedb.com
Blog:http://vibhork.blogspot.com