Hi Bruce, Thanks, I absolutely agree that this documentation needs to explain properly how the bgwriter works. Your latest patch looks good, it significantly improves this section of the manual. I would just suggest changing "non-dirty" to "clean" in "When the number of non-dirty shared buffers appears to be insufficient", as this makes the language simpler and avoids introducing another new term (non-dirty, which means the same as clean).
Thanks again, Chris. On Thu, 12 Nov 2020 at 16:54, Bruce Momjian <br...@momjian.us> wrote: > On Thu, Nov 12, 2020 at 02:40:04PM +0000, Chris Wilson wrote: > > Hi Bruce, > > > > Thanks, yes I agree that that is much clearer. However when you say: > > > > > > When the percentage of dirty shared buffers is high, the background > writer > > writes some of them to the file system... > > > > > > I haven't seen anything about a minimum percentage before the bgwriter > kicks > > in, is that really the case? How is it configured? > > Yes, I see your point. My language was not accurate, and it didn't > match the actual background writer tuning parameters below this text. > Here is an updated doc patch. > > I agree this text should be as clear as possible because there is no way > to properly tune the background writer parameters unless we explain how > it works. It is good you noticed this. > > -- > Bruce Momjian <br...@momjian.us> https://momjian.us > EnterpriseDB https://enterprisedb.com > > The usefulness of a cup is in its emptiness, Bruce Lee > >
