oracle optimizer features enable – oracle query optimization tool

 · By Franck Pachot , Do you know the optimizer_features_enable parameter? What do you think about it? Good or bad to use it? If I tell you to set optimizer_features_enable parameter=11,2,0,4 when you upgrade to 12c, do you think it’s a very safe decision, or totally insane to upgrade and set behavior to previous version? It’s not an underscore parameter, you are allowed to use it, Optimizer

OPTIMIZER_FEATURES_ENABLE

OPTIMIZER_FEATURES_ENABLE

OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number,

Default value : 19,1,0

OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number, For example, if you upgrade your database from release 8,0,6 to release 9,2, but you want to keep the release 8,0,6 optimizer behavior, you can do so by setting this parameter to 8,0,6 ,

optimizer_features_enableは、oracleのリリース番号に基づいて一連のオプティマイザ機能を使用可能にするためのアンブレラ・パラメータとして機能します。

OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number, For example, if you upgrade your database from release 11,1 to release 12,1, but you want to keep the release 11,1 optimizer behavior, you …

Default value : 12,1,0,2

Optimizer

OPTIMIZER_FEATURES_ENABLE

oracle optimizer features enable

The OPTIMIZER_FEATURES_ENABLE initialization parameter or hint controls a set of optimizer-related features, depending on the database release, The parameter accepts one of a list of valid string values corresponding to the release numbers, such as 11,2,0,4 or 12,1,0,2 ,

Why you shouldn’t set OPTIMIZER_FEATURES_ENABLE – Upgrade

 · I have set optimizer_features_enable variable to some value I cannot remember now I’m working on Oracle 10,2,0,5,

optimizer_features_enable tips

Influencing the Optimizer

 · Yes it’s a valid value even if it’s not set by default, And it enables some features that are net enabled by default, such as: http://blog,dbi-services,com/oracle-121021-set-to-join-conversion/ Up to you to see if you don’t have enough with released optimizer new features and you …

optimizer_features_enable — oracle-tech

OFE

 · OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number For example if you upgrade your database from release 101 to release 11,1, but you want to keep the release 10,1 optimizer behavior , …

optimizer_features_enable incompréhensible

OPTIMIZER_FEATURES_ENABLE

OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number,

 · Voila plusieurs jours que je travail à essayer d’améliorer les perfs d’une base Oracle à noter que c’est la première fois que je fais ça A force de modifier les paramètres dans tous les sens j’ai fini par toucher à optimizer_features_enable pour le passer de 10,2,0,3 à 8,0,0,

OPTIMIZER_FEATURES_ENABLE

The optimizer_features_enable is very useful when an execution plan changes after the application of a patch or the installation of a new release, You can set optimizer_features_enable at the system level as an init,ora parameter, at the session level, and at the SQL statement level as a hint, see below:

Optimizer_features_enable Setting In Oracle Database 19c

Oracle Database was upgraded from 12c to 19cand the following behavior was noticed: Siebel Web Tools freezes when attempting to open the workspace if Oracle optimizer_features_enable value is set to ‘112,0,2’ however there is no performance issue in Siebel Public Sector Application,