From: | Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> |
---|---|
To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
Cc: | pgsql-bugs(at)postgresql(dot)org, alex <an(at)clickware(dot)de> |
Subject: | Re: Bug (#3484) - Invalid page header again |
Date: | 2007-12-19 10:45:28 |
Message-ID: | 4768F648.2010009@sun.com |
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Thread: | |
Lists: | pgsql-bugs |
Gregory Stark wrote:
> "Zdenek Kotala" <Zdenek(dot)Kotala(at)Sun(dot)COM> writes:
>
>> I got dump of affected two blocks from Alex and it seems that both blocks were
>> overwritten together with some 128bytes length structure (there some pattern)
>> and complete damaged size is 9728bytes (first block is overwritten completely
>> and second one only at the beginning), but another buffer from another relation
>> could be overwritten too.
>
> I don't understand this 9728 bytes. Postgres blocks are 8192 bytes. Are you
> saying one whole block is trashed and then part, but not all, of the next
> block?
>
> What's the block size of the ZFS filesystem? And what exactly does the trash
> data look like?
>
ZFS has dynamic block size (max 128kB), but this system runs on Linux probably
ext3 FS. Please, ale can you confirm used filesystem?
Zdenek
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