On 18 April 2016 at 12:11, David Rowley <david.row...@2ndquadrant.com> wrote:
> this is not helping me much as I don't really understand why > pg_statistic need to be frozen? > Yeah, in particular it's not clear to me why pg_upgrade goes to such efforts to freeze everything when it copies pg_clog over in copy_clog_xlog_xid() . Is it mainly a defense against the multixact format change? -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
