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Re: BDB log file factoids (prbly part of why they are so big)

From: Tom Lord <lord_at_emf.net>
Date: 2003-04-06 02:04:50 CEST

       But you're right in your subsequent message that we're probably
       writing out the file contents twice to the logfile and once to
       the db, which is pretty wasteful in disk bandwidth and
       short-term space use.

Incidentally, it'd be interesting for someone to instrument an active
repository to measure:

        (a) sizes of incoming write txn traffic

        (b) corresponding growth in BDB data file size

        (c) corresponding growth in BDB log file size

If you care about the recoverability enabled by log files (and some
users won't, of course), then that can give you an empirical formula
for relating disk space requirements to back-up schedules.


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Received on Sun Apr 6 01:56:09 2003

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