On Thu, Sep 25, 2014 at 10:14 AM, Andres Freund <and...@2ndquadrant.com> wrote: > That leads me to wonder: Have you measured different, lower, number of > buffer mapping locks? 128 locks is, if we'd as we should align them > properly, 8KB of memory. Common L1 cache sizes are around 32k...
Amit has some results upthread showing 64 being good, but not as good as 128. I haven't verified that myself, but have no reason to doubt it. -- 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
