Azure SQL Data Warehouse SQL Operations Studio Extension Available

In may the engineering team for Azure SQL Data Warehouse announced integration with SQL Operations Studio. Now they have released a preview of an extension that contains pre built dashboards to monitor you Data Warehouse instances! Today you can monitor data skew, ColumnStore index health, and system resource usage. We expect more scenarios to be…


APS AU7 Performance Enhancements

Appliance Update 7 (AU7) for Microsoft’s Analytic Platform System (APS) brings with it a couple of much anticipated performance enhancements. The first is through new functionality by enabling AUTO UPDATE and AUTO CREATE statistics for appliance level stats objects. We always had auto stats on the compute nodes for the local SQL instances to utilize,…


Performance: Evaluate Data Skew

This topic applies to both Azure SQL Data Warehouse and Analytic Platform System Data skew occurs when one distribution has more data than others.  When data is inserted into a distributed table, each row will be assigned and sent to a distribution for storage.  The distribution a row is sent to is decided by applying…


Locking Behaviour with PDW Backups

You may notice your daily ETL jobs or queries running slower than usual or in a queued state when a PDW backup is running. By design, a Backup operation in PDW requires an Exclusive Update (XU) on the database in order toexecute. This is implemented using a standard Lock Manager in PDW engine and the behaviour…


Loading performance – DWLoader, distribution keys and source files

There are several ways to load data in PDW: SSIS, DWLoader client, and with the latest release BCP also(*) In this post I will discuss a specific performance scenario when loading data with DWLoader. You can refer to .CHM for all details on DWLoader client, parameters, syntax, remarks… The first thing to check when looking…