On 8 November 2012 23:58, Jeff Janes <jeff.ja...@gmail.com> wrote: > On Thu, Nov 8, 2012 at 2:50 PM, Hannu Krosing <ha...@2ndquadrant.com> wrote: >> On 11/08/2012 11:40 PM, Simon Riggs wrote: >>> >>> On 8 November 2012 20:36, Jeff Janes <jeff.ja...@gmail.com> wrote: >>> >>>> It does not seem outrageous to me that there would be real-world >>>> conditions in which invalidations would be sent more than once a >>>> minute over prolonged periods, so this total starvation seems like a >>>> bug. >>> >>> Yes, its a bug, but do you really believe the above? In what cases? > > We see lots of traffic on the mail list about people trying to dump > several hundred thousand tables, or they can only create one database > every two minutes, or truncating hundreds of tables at a time over and > over again gets slow, etc. I know little about the internal of the > invalidation code, but I would think doing that kind of thing must > generate a lot of them.
OK, so the problem is *any* sinval. I thought you meant one sinval per object per minute, which seemed much less likely. I agree one sinval per minute for long periods is actually quite likely. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
