----- Original Message ----- From: "GG" <grzegorzof@xxxxxxxxxx> To: <gerry@xxxxxxxxxxxxxxxxxxx> Cc: "Oracle-L Group" <oracle-l@xxxxxxxxxxxxx> Sent: Tuesday, May 01, 2012 11:53 AM Subject: Re: v$sql - executions vs loads vs invalidations W dniu 2012-05-01 11:41, Gerry Miller pisze: >LOADS: 2794 >INVALIDATIONS: 2793 >EXECUTIONS: 0 You've never mentioned DB version :) but basically looks like statements are only parsed and never executed (application issue ?). You got invalidation because some dependent objects are 'manipulated' via (grants, ddls, stats gathering and so) , loads are because of flushes which could be caused by shared pool free space pressure . For better understanding we need some info about sga size and allocations and ora-4031 related dumps . Meantime You can check =============== Depending on version, invalidation may zero out the execution stats. Earlier 10g versions, for example, would invalidate ALL cursors relating to a global temporary table if ANY user truncated their private copy of that GTT - resulting in lots of library cache invalidation for everyone all the time - and lots of cursors with high invalidation and reload counts, but zero execution stats Regards Jonathan Lewis http://jonathanlewis.wordpress.com Oracle Core (Apress 2011) http://www.apress.com/9781430239543 -- //www.freelists.org/webpage/oracle-l