On Mon, 14 May 2007, ITAGAKI Takahiro wrote:

BTW, your patch will cut LRU writes short, but will not encourage to
do more works. So should set more aggressive values to bgwriter_lru_percent
and bgwriter_lru_maxpages as defaults?

Setting a bigger default maximum is one possibility I was thinking about. Since the whole background writer setup is kind of complicated, the other thing I was working on is writing a guide on how to use the new pg_stat_bgwriter information to figure out if you need to increase bgwriter_[all|lru]_pages (and the other parameters too). It makes it much easier to write that if you can say "You can safely set bgwriter_lru_maxpages high because it only writes what it needs to based on your usage".

* Greg Smith [EMAIL PROTECTED] http://www.gregsmith.com Baltimore, MD

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