pg_logs and pg_variables Files

See my book, last chapter. pg_log is transaction log status.
pg_variable holds next object id and next transaction id.

http://www.postgresql.org/docs/awbook.html

PostgreSQL gurus,

I am in the process of writing a technical book featuring PostgreSQL (among
other technologies). I would like to document the contents of the PGDATA
directory. There are a few files there that I haven't been able to figure out.
They are 'pg_logs' and 'pg_variables'. I can make an educated guess as to the
contents, but I would prefer to hear from those in the know about what these
files are used for.

Thanks,

-- Art Taylor

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  Bruce Momjian                        |  http://candle.pha.pa.us
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