Control File Content and the Limits

Hi, I would like to talk about Control File (CF). One of the most important component of the Oracle Database. It stores many critical data and limits for the database. Last SCN (System Change Number). Last Checkpoint Information. Data file locations. Redo log file locations. RMAN Repository (where the backup related files are). Parameters like

Frequent and Fast Refresh Materialized Views has a Big Problem!

Hi, While I was checking V$SQL_PLAN view for a whole different reason, I realized that some of the cursors has incredibly high child cursors. I started to dig and finally I find the problem. My customer have a few frequently fast refreshed materialized views. One of them is refreshed every 10 seconds (you might say

V$SqlStats vs V$SqlStats_Plan_Hash, different columns?

Hi there, V$SQLSTATSis a beautiful view for information about sql statements. you might say v$sql has that information too which is correct but V$SQLSTATSis much more faster than v$sql and keeps data about sql statements for a longer time than v$sql. However, the V$SQLSTATS view differs from V$SQL and V$SQLAREA in that it is faster, more scalable, and has a

Performance Gain of NOCOPY Parameters

Hi, Almost every Oracle database uses PLSQL codes like packages/procedures/functions etc. Complex systems with complex codes pass many arguments (parameters) many times between plsql objects. Passing parameters might be the most executed operations in a database. So how well do you pass your parameters? I assume you know about types of parameters like IN or