Hi, I upgraded my cluster from 9.6 to 11 with pg_upgrade hardlink parameter two days ago. Since then it has been working great as v11. Today while running heavy update queries on it, I got the "FATAL: invalid page in block 0 of relation global/1262" message and server crushed. Hard reset and trying to start, it start but shows the same error message and do not let me to connect. "psql: FATAL: invalid page in block 0 of relation global/1262". I read that the filenode 1262 is for pg_database table.
Any idea why did it happen and can it be recoverable? Thanks. Regards.
