DBMS_STATS

Enable or Disable Oracle GATHER_STATS_JOB for Automatic Statistics Collection Purpose Two Oracle releases, two different switches. In Oracle Database 10g, automatic optimizer statistics ran as a Scheduler job named GATHER_STATS_JOB, and you turned it on or off with DBMS_SCHEDULER.ENABLE and DBMS_SCHEDULER.DISABLE. From …

Oracle Optimizer Statistics Transfer Guide This guide demonstrates how to migrate schema statistics between Oracle databases using DBMS_STATS procedures - crucial for maintaining consistent execution plans across environments. Exporting and importing optimizer statistics in Oracle Database is essential for maintaining …

Oracle Database: Deleting Statistics with DBMS_STATS Package Deleting optimizer statistics leaves a table with none, and the optimizer then falls back to dynamic statistics: it samples a few table blocks at parse time. The DBMS_STATS package has one delete procedure for each level, from the whole database down to a …

Optimizing Oracle Database Performance with GATHER_SYSTEM_STATS Oracle Database's DBMS_STATS package is a powerful tool for gathering and managing database statistics. This post focuses on the GATHER_SYSTEM_STATS procedure, which is crucial for optimizing query performance by collecting system-level statistics. …

Understanding Oracle Database Statistics Gathering: A Comprehensive Guide Purpose DBA_TAB_STATISTICS is the view that shows what the optimizer knows about each table: the number of rows, the average row length and the number of data blocks. DBMS_STATS is the package that fills those numbers in. The optimizer reads them …

Optimizing Performance with Oracle Database: Gathering Schema and Table Statistics Purpose Automatic optimizer statistics collection runs by itself inside the maintenance windows. Manual DBMS_STATS calls run when you decide, on the objects you choose, with the options you set. The SQL Tuning Guide names a different …