Provided by: postgresql-9.3_9.3.4-1_amd64
pg_xlogdump - Display a human-readable rendering of the write-ahead log of a PostgreSQL database cluster
pg_xlogdump [option...] [startseg [endseg]]
pg_xlogdump displays the write-ahead log (WAL) and is mainly useful for debugging or educational purposes. This utility can only be run by the user who installed the server, because it requires read-only access to the data directory.
The following command-line options control the location and format of the output: startseg Start reading at the specified log segment file. This implicitly determines the path in which files will be searched for, and the timeline to use. endseg Stop after reading the specified log segment file. -b, --bkp-details Output detailed information about backup blocks. -e end, --end=end Stop reading at the specified log position, instead of reading to the end of the log stream. -n limit, --limit=limit Display the specified number of records, then stop. -p path, --path=path Directory in which to find log segment files. The default is to search for them in the pg_xlog subdirectory of the current directory. -r rmgr, --rmgr=rmgr Only display records generated by the specified resource manager. If list is passed as name, print a list of valid resource manager names, and exit. -s start, --start=start Log position at which to start reading. The default is to start reading the first valid log record found in the earliest file found. -t timeline, --timelime=timeline Timeline from which to read log records. The default is to use the value in startseg, if that is specified; otherwise, the default is 1. -V, --version Print the pg_xlogdump version and exit. -x xid, --xid=xid Only display records marked with the given TransactionId. -?, --help Show help about pg_xlogdump command line arguments, and exit.
Can give wrong results when the server is running. Only the specified timeline is displayed (or the default, if none is specified). Records in other timelines are ignored.
Section 29.5, “WAL Internals”, in the documentation