Hello all! Statement is executed alter system set optimizer_adaptive_features = false scope = both; More: SQL Plan Directives are one of… alter system set optimizer_adaptive_features=false scope=both; Start installing 13c software on new home by invoking ‘em13100_linux64.bin’ from the downloaded files. Thank you Diana 2. SQL> alter system set optimizer_adaptive_statistics=FALSE scope =spfile; Do I need to set optimizer_adaptive_features to FALSE explicitly? Keep all files in a single directory. Improve this answer. SQL> alter system set job_queue_processes=20; System altered. ( Run from SYSMAN) Pastebin is a website where you can store text online for a set period of time. The user (owner) of the present EM has to invoke the upgrade. alter system set optimizer_adaptive_plans=FALSE scope=spfile; alter system set optimizer_adaptive_statistics=FALSE scope=spfile; alter system set optimizer_features_enable='12.1.0.2'scope=both; The last parameter will take effect immediately (scope=both) but the first two will require a database restart to go into effect. Because "optimizer_adaptive_features" dynamic parameters do not need to restart the system-level changes. If this is the same server where your database has been installed then, these rpm should be already present. So the end result is : optimizer_adaptive_features=FALSE, optimizer_adaptive_statistics=FALSE , optimizer_adaptive_plans=TRUE It is not clear in the note. SQL> alter system set optimizer_adaptive_features=FALSE scope=both; System altered 4.Verify that all the OMS have the same version of Plugins deployed. Restart the database. This is the case of Adaptive Query Optimization and in this particular case on SQL Plan Directives. Follow answered Apr 4 '17 at 23:21. but it doesn’t work. Question: How do I use the optimizer_adaptive_features parameter? To do so, run the following SQL command: show parameter adaptive; You should see the following output: NAME TYPE VALUE ——————————————————————— In the system of the mentioned customer this lead to the performance issues. Recently, however, I’ve experienced my very first problem with SQL Plan Directives migrating a database to 12c, so I would like to share it. 3. Already available in a test environment test. Adaptive Plan remains disabled. SPD are created when a Auto Re-optimization occurs, which is an evolution of Cardinality Feedback. SQL> alter session set "_optimizer_adaptive_plans"=true; Session altered. ALTER SYSTEM SET OPTIMIZER_ADAPTIVE_FEATURES=false scope=both; ALTER SYSTEM SET OPTIMIZER_DYNAMIC_SAMPLING=0 scope=both; ALTER SYSTEM SET "_fix_control"='12914055:Off' scope=both; Share. ... ALTER SYSTEM SET OPTIMIZER_ADAPTIVE_FEATURES = FALSE SCOPE=BOTH; ... ALTER SYSTEM SET OPTIMIZER_ADAPTIVE_STATISTICS = FALSE SCOPE=BOTH; (Default is FALSE) Details. alter system set optimizer_adaptive_features=false scope=both. Set optimizer_adaptive_features to FALSE; SQL> conn / as sysdba Connected. The new Oracle 12c optimizer adaptive features are just great and work well out of the box in most cases. Pastebin.com is the number one paste tool since 2002. Eli Eli. There isn’t a need to unzip installation files. System altered. SQL> alter session set optimizer_adaptive_features=false; Session altered. SQL> alter system set optimizer_adaptive_features=false; System altered. Answer: Oracle notes that optimizer_adaptive_features enables or disables all of the adaptive optimizer features, including adaptive plan (adaptive join methods and bitmap plans), automatic re-optimization, SQL plan directives, and adaptive distribution methods. Verify that the changes have taken effect. 3. Make sure below RPM's are already installed on server. As DBAs we are always being recommended by Oracle and also recommending to clients to update their databases, but we have to be aware about new features and their effects. set “_optimizer_gather_feedback”=false.
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