Обсуждение: The max value of autovacuum_vacuum/analyze_scale_factor.
Hi all, Is there any reason why the max values of autovacuum_vacuum/analyze_scale_factor are 100.0? These max values are defined since when the parameters has been introduced but I think that 1.0 is enough. Patch attached. Regards, -- Masahiko Sawada NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center
Вложения
On Mon, Dec 5, 2016 at 4:44 PM, Masahiko Sawada <sawada.mshk@gmail.com> wrote: > Hi all, > > Is there any reason why the max values of > autovacuum_vacuum/analyze_scale_factor are 100.0? These max values are > defined since when the parameters has been introduced but I think that > 1.0 is enough. > Yes, at least from https://www.postgresql.org/docs/devel/static/runtime-config-autovacuum.html, it looks like this is supposed to be a "fraction of table size". anything higher than 1.0 isn't a fraction. If at all any value > 1.0 has a meaning, I am wondering whether it's to account for bloat. But then who would want to place the threashold in bloated area. -- Best Wishes, Ashutosh Bapat EnterpriseDB Corporation The Postgres Database Company
On Mon, Dec 5, 2016 at 9:15 PM, Ashutosh Bapat <ashutosh.bapat@enterprisedb.com> wrote: > On Mon, Dec 5, 2016 at 4:44 PM, Masahiko Sawada <sawada.mshk@gmail.com> wrote: >> Hi all, >> >> Is there any reason why the max values of >> autovacuum_vacuum/analyze_scale_factor are 100.0? These max values are >> defined since when the parameters has been introduced but I think that >> 1.0 is enough. >> > > Yes, at least from > https://www.postgresql.org/docs/devel/static/runtime-config-autovacuum.html, > it looks like this is supposed to be a "fraction of table size". > anything higher than 1.0 isn't a fraction. If at all any value > 1.0 > has a meaning, I am wondering whether it's to account for bloat. But > then who would want to place the threashold in bloated area. > I understand that use case. Thank you! Regards, -- Masahiko Sawada NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center