Tom Lane wrote: > Bruce Momjian <[EMAIL PROTECTED]> writes: > > I am confused. If we change the percentage to be X% of the entire > > buffer cache, and we set it to 1%, and we exit when either the dirty > > pages or % are reached, don't we end up just scanning the first 1% of > > the cache over and over again? > > Exactly. But 1% would be uselessly small with this definition. Offhand > I'd think something like 50% might be a starting point; maybe even more. > What that says is that a page isn't a candidate to be written out by the > bgwriter until it's fallen halfway down the LRU list.
So we are not scanning by buffer address but using the LRU list? Are we sure they are mostly dirty? -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
