On Fri, 2008-03-28 at 11:33 -0400, Chris Browne wrote: > [EMAIL PROTECTED] (Bruce Momjian) writes: > > Added to TODO: > > > > * Allow one transaction to see tuples using the snapshot of another > > transaction > > > > This would assist multiple backends in working together. > > http://archives.postgresql.org/pgsql-hackers/2008-01/msg00400.php > > FYI, code for this is presently available on pgFoundry, at: > <http://pgfoundry.org/projects/snapclone/>. > > I have some benchmarking scripts to commit to it, once I get added to > the project. (Simon? :-)) > > FYI, preliminary testing, on a machine hooked up to an EMC CX700 disk > array is showing that, if I do concurrent dumps of 4 tables, it gives > a bit better than a 2x speedup over dumping the four tables serially, > so there's definitely some fruit here.
Oh, very cool. Thanks for testing. I'll add you now - must have missed that, sorry. My view is that the TODO item is still needed because we want to work this into the backend more fully. -- Simon Riggs 2ndQuadrant http://www.2ndQuadrant.com PostgreSQL UK 2008 Conference: http://www.postgresql.org.uk -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
