That looks to be a file hanging around from a previous PITR backup.
That file should be in your xlog archive.

cat the contents and you'll see which backup it belongs to.

Andy.

Mr. Dan wrote:
> Hi,
>
> I do an online backup with v814 and v810. I've noticed that there is
> a file showing up in the PGDATA
> directory/pg_xlog/00000000010000251000000C2.0021CDDE.backup owned by
> postgres 284 bytes in size that shows up in v810. That file isn't
> showing up in v814. Is that by design?
>
> ~DjK
>
>
> psql -d somedb "SELECT pg_start_backup()
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faq
>
> !DSPAM:37,44cf7a71143292031717456!
>
>


---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match