Re: Problem creating a database

>
> > > > Recently I attempted to create a new database in this cluster. The
>> command succeeds,
>> > > > but when I try to connect to the new database, I get a "could not
>> open file" error:
>> > > >
>> > > > psql: FATAL: could not open file "base/618720/2610": No such file
>> or directory
>> > > >
>> > >
>> > > Looks like the file backing the "pg_index" table is gone.
>> > >
>> > > Can you check if the file exists in the data directory or not?
>> >
>> > Thanks for the tip. I've checked and the on-disk file behind "pg_index"
>> still exists.
>> >
>> > I have existing databases in this cluster that I'd prefer not to drop
>> and recreate if possible.
>> >
>> > I've tried dropping and recreating the new database I want to use, but
>> each time get the same type of error.
>>
>> "pg_index" initially uses file 2610.
>>
>> Anyway, your database seems to be quite wrecked, and you'd probably need
>> an expert to save what can be saved.
>>
>
>
So you're right about it being seriously corrupted somehow. All my custom
databases seem to work fine. I have data checksums and amcheck enabled and
haven't found any issues using the query below.

SELECT bt_index_check(index => c.oid), c.relname, c.relpages
FROM pg_index i
JOIN pg_opclass op ON i.indclass[0] = op.oid
JOIN pg_am am ON op.opcmethod = am.oid
JOIN pg_class c ON i.indexrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE am.amname = 'btree'
-- Don't check temp tables, which may be from another session:
AND c.relpersistence != 't'
AND i.indisready AND i.indisvalid
ORDER BY c.relpages DESC;

However, when I went to connect to template1, it failed:

# \connect template1
FATAL: could not open file "base/1/2610": No such file or directory
Previous connection kept

If template1 is corrupt, that would explain why I am unable to create new
databases.

Guess it's time to rebuild.