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Statistics gathering and SQL Tuning Advisor

Our monitoring software found a long running job on one of our client’s databases. The job was an Oracle’s auto task running statistics gathering for more than 3 hours. I was curious to know why it took so long and used a query to ASH to find out the most common SQL during the job…

SQL Server 2014 CTP2 – Memory Optimization Advisor

Today I am going to discuss one of the amazing new features, Memory Optimization Advisor of SQL Server 2014 CTP2. I discussed architectural details of SQL Server 2014 In-Memory Optimizer in my last blog post here. We will discuss Memory Optimization Advisor implementation with a demo in this blog post. This tool helps customers in migrating…

Log Buffer #352, A Carnival of the Vanities for DBAs

Jingle bells are all the way towards the happy new year. Whether the database bloggers are basking at white, sandy beaches or warming up indoors in white, snowy mornings, they are gearing up with their blog posts to start the new year with a bang. Log Buffer shares that enthusiasm with them.

How to Apply a Standby-First PSU Patch in a 2 node RAC environment

Oracle provides since it’s 11.2.0.1 version a way to apply certain patches, to our standby environment first, without compromising the primary database, to allow to let it burn in the Standby  for the time you deem appropriate and then apply the patch binaries to the primary BD ORACLE_HOME and these will cascade into our Standby DB. The first…

Do you have enough Redo?

The question of whether a database has enough redo logs available is quite common. The documentation suggests to use FAST_START_MTTR_TARGET and V$INSTANCE_RECOVERY.OPTIMAL_LOGFILE_SIZE to identify “the optimal” redo log size based on the target recovery time. I’ve never used it and can’t comment if it is a correct/reasonable way or not. The easiest way to identify…

SQL Server 2014 CTP 2 : Native Backup Encryption

Today we will discuss the native backup encryption new feature introduced in SQL Server 2014 CTP2. The native backup encryption feature will create an encrypted backup file for SQL Server database. This is a feature that third party vendors have provided in the past, but we now have the feature for encrypted backups integrated with…

How to Install a Clustered SQL Server 2012 Instance – Part 3

In continuation of our series on how to install a SQL Server 2012 clustered instance, let’s discuss how to add a node into an existing SQL Server clustered instance. The following steps are performed either to add one more node to some already installed clustered instance, or to continue the installation of a brand new clustered…

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