Re: [PERFORM] [BUGS] BUG #1552: massive performance hit between 7.4

2005-03-27 Thread Karim Nassar
On Fri, 2005-03-25 at 10:18 +, Simon Riggs wrote: > > When running with PostgreSQL 7.4 on a dual-CPU Athlon MP2400+ machine > > with a gigabyte of RAM, running Debian Linux version 2.6.8.1, we were > > able to insert all this data in 5-7 minutes. It's taken a while to > > install Postgres 8

Re: [PERFORM] [BUGS] BUG #1552: massive performance hit

2005-03-25 Thread Simon Riggs
On Fri, 2005-03-25 at 03:50 -0700, Karim Nassar wrote: > On Fri, 2005-03-25 at 10:18 +, Simon Riggs wrote: > > > When running with PostgreSQL 7.4 on a dual-CPU Athlon MP2400+ machine > > > with a gigabyte of RAM, running Debian Linux version 2.6.8.1, we were > > > able to insert all this data

Re: [PERFORM] [BUGS] BUG #1552: massive performance hit between 7.4 and 8.0.1

2005-03-25 Thread Tom Lane
Simon Riggs <[EMAIL PROTECTED]> writes: > I think we should spawn a TODO item from this: > * Coerce FK lookups to always use an available index No, we aren't doing that. The correct TODO item is "Replan cached plans when table size has changed a lot" which of course depends on having a framework

Re: [PERFORM] [BUGS] BUG #1552: massive performance hit between 7.4 and 8.0.1

2005-03-25 Thread Simon Riggs
On Wed, 2005-03-23 at 14:22 -0500, Keith Browne wrote: > Simon Riggs wrote: > > > The EXPLAINs you've enclosed are for SELECTs, yet your bug report > > describes INSERTs as being the things that are slow. > > [You may find better performance from using COPY] > We're starting with an empty databas