Re: Stange IO error while working with large objects.

[Dmitriy Igrishin <dmitigr@xxxxxxxxx>]

I've checked the disk with badblocs(8). The results are:

File /pgsql/9.0/data0/base/16386/11838.5 (inode #3015588, mod time Wed Mar 30 13:13:13 2011) 
 has 50 multiply-claimed block(s), shared with 1 file(s):
ÂÂÂ <The bad blocks inode> (inode #1, mod time Wed Mar 30 15:23:19 2011)

After this, I've dropped the database and create a new one. Problem is solved.
All the same it is interesting, why there was such problem? I am disturbed because
I intend to use large objects in production...

Suggestions ?

2011/3/30 Dmitriy Igrishin <dmitigr@xxxxxxxxx>

Hey all,

I've never experienced such problems before pefrorming some tests

on large objects. I am on Ubuntu and my HDD is whole encrypted

(LVM2). I've imported large object ~ 1.5 Gb of size. After this, entire

system lost performance dramaticaly and the disk activity becomes

anomalous.

After reboot everithing is fine with OS, but attempt to remove all

large object results in error:

dmitigr=# select lo_unlink(loid) from (select distinct loid from pg_largeobject) as foo;

ERROR: Âcould not read block 704833 in file "base/16386/11838.5": read only 4096 of 8192 bytes

What does this means -- hardware / OS / PostgresÂfailure ?

Any suggestions ?Â

--
// Dmitriy.

-- 
// Dmitriy.