Recently I wanted to create a policy managed database in my 12.1.0.2 flex cluster setup, but free servers are not available. Hence I had to unregister an administrator managed RAC database (amdbh12) to make the servers available. Having completed my testing, I dropped the policy managed database and then wanted to drop the database amdbh12 using DBCA… Read more
In the first installment of this series I gave an informal description of how the optimizer would consider the possibilities when choosing an execution path for a simple two-table join between an orders table and an order_lines table that I had described. In that installment I supplied the DDL for the tables and its indexes; in this installment I’m going… Read more
SQL Server filtered indexes can save space and improve performance if they are used properly. Under what circumstances can they be used? When are they most effective, and what sort of performance gain or space-saving is likely? How does a filtered index affect the choice of execution plan? Seth explores these questions with practical experiments… Read more
Imagine that you're researching Continuous Cluster Replication, looking for a simple, direct guide to the basics of getting it set up and running. What do you do if everything you find is either too specialised, or goes into far more detail than you need? If you're Brien Posey, and you can't find that practical, to-the-point article, you roll up your sleeves and write it yourself. To kick off, he tackles the rather tedious task of setting up a Majority Node Set Cluster.… Read more
