On Sun, May 13, 2012 at 10:01 AM, Craig James <cja...@emolecules.com> wrote:
> > On Sun, May 13, 2012 at 1:12 AM, Віталій Тимчишин <tiv...@gmail.com>wrote: > >> >> The sequences AFAIK are accounted as relations. Large list of relations >> may slowdown different system utilities like vacuuming (or may not, depends >> on queries and indexes on pg_class). >> > > Not "may slow down." Change that to "will slow down and possibly corrupt" > your system. > > In my experience (PG 8.4.x), the system can handle in the neighborhood of > 100,000 relations pretty well. Somewhere over 1,000,000 relations, the > system becomes unusable. It's not that it stops working -- day-to-day > operations such as querying your tables and running your applications > continue to work. But system operations that have to scan for table > information seem to freeze (maybe they run out of memory, or are > encountering an O(N^2) operation and simply cease to complete). > Glad I found this thread. Is this 1M relation mark for the whole database cluster or just for a single database within the cluster? Thanks, -Greg
