Seek or Scan – Cost Based Optimizer in SQL Server

When SQL Server has a choice of plans, it will compare the cost among a set of execution plans and will choose the cheapest one. In some cases, even...

Temp Table Caching in SQL Server

SQL Server caches temporary objects (temporary tables and table variables), that are created in a stored procedure. Temporary objects that are created either in dynamic SQL statement or by...

Tempdb Allocation Contention in SQL Server

In SQL Server, the concurrent creation of temporary objects (temporary tables and table variables) from many sessions can lead to tempdb allocation contention. This contention occurs on PFS and...

Tempdb Metadata Contention in SQL Server – Table Variable Vs Temporary Table

In SQL Server, the concurrent creation of temporary tables from many sessions can lead to tempdb metadata contention. Tempdb metadata contention does not affect the concurrent creation of table...

Understanding ASYNC_NETWORK_IO Waits in SQL Server

In SQL Server, ASYNC_NETWORK_IO wait time can be high due to slow network, like when the database is in the cloud and the application is on premise. Furthermore, it...

Resource Governor in SQL Server – Workload Throttling

Resource Governor in SQL Server provides CPU, Memory and I/O throttling. In SQL Server 2014 and earlier, CPU throttling works only for similar kind of workloads and not for...

SQLPASS SUMMIT 2016 Discount Code

SQLPASS SUMMIT 2016 is around, only few months left for this super event. Probably you all would have heard about...

Hello SQLSaturday Houston!

I've been looking forward to speaking at SQLSaturday Houston again all year!

Big thanks to the organizing crew behind this great...

SQL Server – Row Level Security in SQL 2016 – Part 2

Hi friends, in my previous post we have learnt how to implement Row Level Security feature in our database. You...

The New Global Dashboard

Redgate recently released SQL Monitor 5.2, which is the latest upgrade to our monitoring/alerting/troubleshooting product for DBAs. This was the...