Misc | From SQL*Plus: alter system set remote_os_authent = FALSE scope = spfile; The above SQL*Plus command will set the parameter to take effect at next system startup. This is the third and final post on follow up questions from the Redgate webinar I did on 12c Adaptive Optimization (the link goes to a recording of the webcast by the way).. Also, here are links to the 2 earlier posts: 12c Adaptive Optimization – Part 1. Be aware if you had optimizer_adaptive_features=FALSE before applying this BP you may encounter now plan changes due to optimizer_adaptive_plans=TRUE by default. OPTIMIZER_ADAPTIVE_STATISTICS is false so by default you will not have the following 12c features: SQL Plan Directives, Statistics feedback, Performance feedback, Adaptive dynamic sampling for parallel query. Setting "EVENTS" or setting "EVENT" Good Morning Gentlemen,I have a few questions regarding setting 'EVENTS' or setting 'EVENT'.I see that I am able to set an event with either an 'alter system set eventS' or add 'event'= in initialization parameter file. END; alter session set optimizer_adaptive_features =false; Statement 2. alter session set optimizer_adaptive_plans =true. About, About Tim Hall Oracle introduced a new feature Adaptive Query Optimization is a term used in Oracle Database 12c to describe a collection of features that work together to allow the cost based optimizer (CBO) to improve the accuracy of execution plans. WebLogic | 21c | PL/SQL | ... [ID 11930680.8] where the Workaround is to set optimizer_secure_view_merging=false which may not be acceptable in many cases. FALSE – It’s DEFAULT value; Changeable with: ALTER SYSTEM; ALTER SESSION; PARALLEL hint. SQL> alter system set cluster_database=false; alter system set cluster_database=false * ERROR at line 1: ORA-02095: specified initialization parameter cannot be modified If Using spfile use the below command : SQL> alter system set cluster_database=false scope=spfile; How to set the value of optimizer_adaptive_features parameter as 'false' from SQL prompt in Oracle Database 12c? 13c | ... SQL> alter system set global_names=TRUE scope=both; System altered. Setting optimizer_adaptive_statistics to FALSE does not disable the creation of SQL plan directives. Parameter settings with scope=both will take effect immediately. There are two answers: The system is an unpatched 12.2 system: 11g | Disable O7_dictionary_accessibility to restrict access to system tables to users granted privileges to access objects owned by all users. SOLUTION: First, we need to check whether the parameter is system modifiable or not. Note that by default the parameter is set to TRUE and, therefore, all the mentioned features are enabled. Videos | The default name for a trace files is INSTANCE_PID_ora_TRACEID.trc where: INSTANCE is the name of the Oracle instance, set optimizer_adaptive_features=false This disables all adaptive features of the optimizer and that’s probably too wide. No. Let’s first set parallelism on the object level. Q: Does adaptive distribution for parallel processing work as expected on a Virtual server where resources can be spread over several other servers? Home | Both parameters are modifiable at both the session and system level. OPTIMIZER_ADAPTIVE_PLANS: Default (TRUE). This change in the control of the adaptive optimizations has been back-ported to 12.1. OPTIMIZER_ADAPTIVE_PLANS controls adaptive plans. A: Yes, set optimizer_adaptive_reporting_only = true.
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