Re: could not rename xlog (was: BUG #2712)

> "Peter Brant" <Peter(dot)Brant(at)wicourts(dot)gov> writes:
>> The same problem exists in 8.1 too. See this thread
>> http://archives.postgresql.org/pgsql-bugs/2006-04/msg00177.php
>> Tom and Magnus tracked down a cause, but I don't think a fix was ever
>> implemented.
>
> Thomas seems to have two different issues there: the "could not rename
> file" problem on the pg_xlog file is probably explained by the mechanism
> we identified back then (and I'm not sure why no fix has been
> installed)

just had another total lockdown. the writer-process was trying to rename the
C1 to CA which failed:

2006-10-24 14:27:58 [5196] LOG: 00000: could not rename file
"pg_xlog/0000000100000004000000C1" to "pg_xlog/0000000100000004000000CA",
continuing to try
2006-10-24 14:27:58 [5196] LOCATION: pgrename, dirmod.c:142

when checking the process with process explorer, it reveals that it has this
file handles to pg_xlog open:

D:\DB\PostgreSQL-8.2\data\pg_xlog
D:\DB\PostgreSQL-8.2\data\pg_xlog\0000000100000004000000C3

under normal operation, "writer process" does not seem to have a file handle
to the xlog directory (D:\DB\PostgreSQL-8.2\data\pg_xlog)

the last error log entry prior to the lockdown was about 15min, so probably
the two problems are unrelated.

unfortunately, before i could try to get more informations, i had to restart
the pg_ctl due to the system being in half-productive mode. that leads me to
the question: what are the chances of me being helpful with getting more
informations? i can have the db run like that for some more days, but for
long term i can't babysit our application and might have to go back to 8.1.

thanks,
thomas