Simon Riggs wrote: > On Mon, 2010-05-03 at 13:13 -0400, Stephen Frost wrote: > > > Perhaps you could speak to the specific user > > experience difference that you think there would be from this change? > > The difference is really to do with the weight you give to two different > considerations > > * avoid query cancellations > * avoid having recovery fall behind, so that failover time is minimised > > Some people recognise the trade-offs and are planning multiple standby > servers dedicated to different roles/objectives.
I understand Simon's point that the two behaviors have different benefits. However, I believe few users will be able to understand when to use which. As I remember, 9.0 has two behaviors: o master delays vacuum cleanup o slave delays WAL application and in 9.1 we will be adding: o slave communicates snapshots to master How would this figure into what we ultimately want in 9.1? -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers