> archive_command = 'test ! -f /usr/local/wal_archive_local/%f && cp %p
> /usr/local/wal_archive_local/%f'
The archive command tests if the wal segment exists and is a file,
but it does not check if the file is still being written. You need to
copy the file after writing has finished (it reached 16777216 bytes).
I don't have sources of pg_standby near me, but I remember in the
C code checks for complete segment sizes.
thanks
Ioannis Tambouras