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 gsmith@xxxxxxxxxxxxx http://www.gregsmith.com Baltimore, MD -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
