Daniele Varrazzo wrote: > Hello, > > at Prato PgDay in 2007 I remember hearing in a speech about a (then > yet to come) "seqscan piggyback" feature, allowing concurrent > sequential scans to use the same disk reads. I've now googled for info > about this feature, but I found nothing conclusive (e.g. [1], [2] - > which I don't know where is linked). > > So I'd like to know: > > is this feature currently implemented (I'm specifically interested in PG 8.3)? > Is there any prerequisite needed to benefit from it (config setting, > query characteristic, etc.)? > Is there any feedback showing the feature kicking in (e.g. an explain > analyze output, log, etc.)? The feature is called 'synchronize_seqscans' and was implemented in Postgres 8.3. -- Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us EnterpriseDB http://enterprisedb.com PG East: http://www.enterprisedb.com/community/nav-pg-east-2010.do + If your life is a hard drive, Christ can be your backup. + -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
