Christopher Petrilli <[EMAIL PROTECTED]> writes:
> I have a unique scenerio.  My DB is under "continual load", meaning
> that I am constantly using COPY to insert new data into the DB.  There
> is no "quiet period" for the database, at least not for hours on end. 
> Normally, checkpoint_segments can help absorb some of that, but my
> experience is that if I crank the number up, it simply delays the
> impact, and when it occurs, it takes a VERY long time (minutes) to
> clear.

If you are using 8.0, you can probably alleviate the problem by making
the bgwriter more aggressive.  I don't have any immediate
recommendations for specific settings though.

A small checkpoint_segments setting is definitely bad news for
performance under heavy load.

                        regards, tom lane

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