On Wed, May 28, 2014 at 10:49 PM, Fujii Masao <masao.fujii@gmail.com> wrote:
> You're concerned about the scenario using pg_upgrade? I'm not sure the detail
> of pg_upgrade. But if it doesn't work properly, we should have gotten
> the trouble
I'm not worried about pg_upgrade, because by design pg_stat_statements
will discard stats files that originated in earlier versions. However,
I don't see a need to change pg_stat_statements to serialize its
statistics to disk in the pg_stat directory before we branch off 9.4.
As you mentioned, it's harmless.
--
Peter Geoghegan