Hi Greg Oracle's behaviour seems a bit strange. Contrary to metalink entry method_opt 254 buckets does get decent response though not the best. We have more issues to iron out. But at least we seem to have hold of one issue :-( On Fri, Mar 23, 2012 at 9:33 AM, Greg Rahn <greg@xxxxxxxxxxxxxxxxxx> wrote: > Does the column referenced by the bind variable have a histogram on it? > If so, is the value a popular one or not? Have you experimented w/o a > histogram? > > I would troubleshoot the root cause, but one option is to use a SQL plan > baseline to give the plan from the literal version to the bind version. > > https://blogs.oracle.com/optimizer/entry/how_do_i_deal_with_a_third_party_application_that_has_embedded_hints_that_result_in_a_sub-optimal_ex > > > On Thu, Mar 22, 2012 at 10:53 PM, GovindanK <gkatteri@xxxxxxxxx> wrote: > >> Linux RAC ,11.1.0.7 >> Query runs fast with hard coding / SQL*Plus '&' ; But when run through the >> application using bind variables , the plan is different and it goes for >> MERGE CARTESIAN JOIN. Metalink , google , underscore parameters are not of >> much help. Tried different bucket sizes with statistics ; Tried rewriting >> the query; Marginal improvement ; If you hard code or with SQL*Plus '&' >> the >> query runs in 1 second .. but with bind variable it takes anywhere from 3 >> to 10 minutes depending on the input values. >> With hard code , it does not do MCJ but plan is different for few tables. >> I don't say the query is written the best way. >> >> > -- > Regards, > Greg Rahn | blog <http://bit.ly/u9N0i8> | twitter<http://bit.ly/v733dJ> | > linkedin <http://linkd.in/gregrahn> > -- //www.freelists.org/webpage/oracle-l