check your triggers and constraints. see what is being fired when you do the insert. foreign key means a lookup in a parent table. trigger could be selecting from somewhere. -------------- Original message -------------- > I am trying to tune a custom app running on Oracle 9=2E2=2E0=2E5 for AIX > 5L=20= > (64bit) and found the following SQL in my statspack snapshot=2E=20= > > > 1) Why there are so many LIOs on an INSERT statement? > 2) What can I do to reduce the LIOs? > > TIA=2E=2E=2E=2E Patty > > INSERT INTO PROD=2ECLAIM_RELATED_RULE ( CLRR_CLAIM_RULE_ID,=20= > CF_CLAIM_FORM_ID,=20= > CLAIM_FORM_REVISION_NO, CL_CLAIM_ID, CLAIM_REVISION_NO, CD_DETAIL_ID,=20= -- //www.freelists.org/webpage/oracle-l