Robert Haas <robertmh...@gmail.com> writes: > On Mon, May 21, 2012 at 12:23 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> If we were sure that the kernel error was permanent, then this argument >> would be moot: the data is gone already. The scary thought here is that >> it might be a transient error, such as a not-always-repeatable kernel >> bug. In that case, zeroing the page would indeed lose data that had >> been recoverable before.
> Yeah, and in fact I think that's probably not a terribly remote > scenario. Also, if you're running on dying hardware, you really do > NOT want to force the kernel to write a whole bunch of pages back to > the dying disk in the midst of trying to pg_dump it before it falls > over. You just want to read what you can of what's there now. Hm? zero_damaged_pages doesn't cause the buffer to be marked dirty, so I dunno where these alleged writes are coming from. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers