If table is highly volatile then locking the statistics prevent in execution plan from changing and thus helps in plan stability for some period of time. That is why many guys prefer to unlock the stats, gather the stats and finally lock the stats. How to check if table stats is locked: ...
Oracle Database - Enterprise Edition - Version 10.1.0.2 to 12.1.0.2 [Release 10.1 to 12.1]: How to View Table Statistics History
In Oracle there is a table structure that defines a temporary table for the current session. This structure is called a global temporary table. The global temporary table definition is visible to all the sessions created by the user, but the data is only visible to the session in ...
Use the ANALYZE command to collect statistics that can be used by Oracle to implement a cost-based approach to SQL statement optimization. You can supply additional "hints" to the optimizer as needed. Call the DBMS_APPLICATION_INFO.SET_ACTION procedure before beginning a transaction to register ...
Copied to Clipboard Error: Could not Copy ALTERTABLEt6ADDCOLUMNfutureDATETIMEDEFAULT(ADD_MONTHS(NOW(),2)); In fact, several functions are acting like aliases. If we check the output ofSHOW CREATE TABLEstatement, we can see that the function is translated: ...
The statistics inListing 3just after the SQL show the different types of activities called by the query (under CALL): PARSE, EXECUTE, and FETCH. The rest of the output shows execution statistics for the different activities in a table format. Here are some important table columns in the tkpr...
Copied to Clipboard Error: Could not Copy ALTERTABLEt6ADDCOLUMNfutureDATETIMEDEFAULT(ADD_MONTHS(NOW(),2)); In fact, several functions are acting like aliases. If we check the output ofSHOW CREATE TABLEstatement, we can see that the function is translated: ...
Oracle Database Cloud Exadata Service - Version N/A and later Information in this document applies to any platform. Goal During the investigation of a SQL Tuning issue, it is often useful for Oracle Support to be able to work directly on a reproduction of the execution plan in a testing en...
The following table describes the reported statistics from the -p option.Field Name Description atch/s The number of page faults, per second, that are satisfied by reclaiming a page currently in memory (attaches per second). Instances include reclaiming an invalid page from the free list ...
For a guest domain, 4 GB of memory and two full CPU cores per 10GbE link is recommended. This ensures adequate fanout capability for the vnet device. For Oracle Solaris 11–based domains, you can check the effective fanout by using thedladm show-linkprop <linkname></linkname>command to ...