On Wed, May 22, 2013 at 11:02 PM, Andres Freund <and...@2ndquadrant.com> wrote: > On 2013-05-22 22:51:13 -0400, Robert Haas wrote: >> In discussions today, Tom Lane suggested testing the time to start up >> a backend and run a simple query such as "SELECT 2+2" in the absence >> of a relcache file. > >> I did this and can't measure any overhead as a result of MVCC catalog >> access. I tried it with no active connections. I tried it with 600 >> idle active connections (to make taking MVCC snapshots more >> expensive). > > Did you try it with the 600 transactions actually being in a transaction > and having acquired a snapshot?
No... I can hack something up for that. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
