Tag: SGA
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CPU Load Testing Exercises: Tools and Analysis for Oracle Database Servers
CPU Load Testing Exercises: Tools and Analysis for Oracle Database Servers This document describes some basic CPU load testing exercises on three different types of database servers used by the Oracle Service at CERN. It reports on the tests performed, tools used for data gathering, data analysis, findings, and lessons learned. Motivations CPU usage is
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Which shared memory segments belong to my database instance?
Which shared memory segments belong to my database instance? I’ve already described how important is to test your backup strategy and restore/recovery procedures, but while doing so, you could of course encounter some problems, not really related with the recoverability as such. Recently, we’ve got such a problem on our recovery server, at the very
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Scaling up Cardinality Estimates in 12.1.0.2
Scaling up Cardinality Estimates in 12.1.0.2 Topic: Counting the number of distinct values (NDV) for a table column has important applications in the database domain, ranging from query optimization to optimizing reports for large data warehouses. However the legacy SQL method of using SELECT COUNT (DISTINCT <COL>) can be very slow. This is a well