On Fri, Nov 30, 2012 at 1:23 PM, Kevin Grittner <kgri...@mail.com> wrote:
> Henry Drexler wrote: > > > why would the query time go from 4 minutes to over 50, for an > > increase in table rows from 30 million to 65 million? > > Did the active (frequently referenced) portion of the database go > from something which fit in cache to something which didn't? Did > any hash table or sort nodes in plans go from fitting in work_mem > to spilling to disk? Did any indexes need an extra level in the > tree? Did any plans change based on size to something which is less > than optimal, suggesting a need to tune the cost factors? > > -Kevin > Thank you for the list - I will research those in the manual.
