We're only working with a single database on this system, and yes, I
attempted a pg_dump earlier today on just one single table - it
failed (I know pg_dump and pg_basebackup use different mechanisms.)
Mind you it's a large table with 154,000 rows in it. The overall
database is somewhere around 43GB.
On 7/17/2014 3:16 PM, Scott Whitney
wrote:
a) How many databases do you have?
b) Have you tried to pg_dump the database(s) to see if
that succeeds?
If you _can_ pg_dump (which you might or might not be
able to do), you could re-init the cluster and restore.
Hi
all,
You may have seen my post from yesterday about our production
database getting corrupted. Well, this morning we brought the
system down to single user and ran an fsck which did
report some drive errors. We repeated until no additional
errors were reported. Then, we brought the system back to
multi-user status and ran a successful pg_basebackup on the
broken database. Since then we restarted the database and a ps
-ef result looks like:
/usr/pgsql-9.2/bin/postmaster -D /opt/datacenter -o -c
zero_damaged_pages=true -i -N 384 -p 5431
After the Db started up, we ran a VACUUM FULL ANALYZE which
ran for about 3 hours, but the database is still showing the
same type of errors in its log: invalid page header in
block 29718... etc. What disturbed me a little, is that I
don't think the zero_damaged_pages got applied. Checking the
pg_settings table, we got:
select name, setting, boot_val, reset_val from pg_settings
where name = 'zero_damaged_pages';
name | setting | boot_val |
reset_val
---------------------------------------------------------------------------------
zero_damaged_pages | on | off | on
Now, my colleague ran this after he tried running some
operations again after I told him how to set
zero_damaged_pages again. He swears that that it was on when
the first VACUUM
FULL ANALYZE was run, but I'm not as sure. Plus, I don't
understand why the boot_val shows as off. In any event, as
we're still getting log errors like before, I don't really
know
what to try next other than rerunning the VACUUM FULL again.
Help?
--
Jay
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