On Mon, 14 May 2007, Heikki Linnakangas wrote:

If it's safe to set it high, let's default it to infinity.


The maximum right now is 1000, and that would be a reasonable new default. You really don't to write more than 1000 per interval anyway without taking a break for checkpoints; the more writes you do at once, the higher the chances are you'll have the whole thing stall because the OS makes you wait for a write (this is not a theoretical comment; I've watched it happen when I try to get the BGW doing too much).

If someone has so much activity that they're allocating more than that during a period, they should shrink the delay instead. The kinds of systems where 1000 isn't high enough for bgwriter_lru_maxpages are going to be compelled to adjust these parameters anyway for good performance.

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

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