On Tue, 10 Feb 2009, justin wrote:
http://www.varlena.com/GeneralBits/Tidbits/annotated_conf_e.html
checkpoint_segments
Maximum distance between automatic WAL checkpoints, in log file segments (each
segment is normally 16 megabytes).
Increase these settings if your database has lots of large batch writes to
decrease the frequency of checkpoints (and thus lower disk activity). Decrease
them if you are short on disk space or your environment has a significant risk
of unexpected power-outs, as any un-checkpointed transactions will dropped on
restart.
You mentioned getting to there via
http://wiki.postgresql.org/wiki/Performance_Optimization
You'll note that link is disclaimed with "older version of material
covered in the GUC tour", and it's aimed at PostgreSQL 7.4. If you read
the current version of that document at
http://www.pgcon.org/2008/schedule/attachments/44_annotated_gucs_draft1.pdf
you'll see that text you've noted is incorrect isn't there anymore.
--
* Greg Smith gsm...@gregsmith.com http://www.gregsmith.com Baltimore, MD
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