Using wait stats on SQL Server

I wrote two posts about wait stats:  What wait means About SQL Server saving wait stats on DMVs Now, going deeper on wait stats and see "why SQL Server is running slow?". To answer that question I like to start with the DMV sys.dm_os_wait_stats, because this DMV provides a running total of all waits encontered … Continue reading Using wait stats on SQL Server

Execution runtime information for developers ;)

Developers should use this statistics to get more information about what they just did and pay attention to high physical or logical read values. SQL Server provides commands that are used to return query statistics like SET STATISTICS IO, TIME. The IO command return information about physical, logical for tables referenced in the query and … Continue reading Execution runtime information for developers 😉

Wait Statistics

The first post about waits on SQL Server was regarding what SQL Server Wait means, a brief explanation and the concept might be difficult to catch at first. When the task needs to wait for a resource, it is placed on a list until the resource is available. SQL Server keeps detailed internal records of … Continue reading Wait Statistics

Wait wait wait…

Let's talk about why we have to wait and how to understand the wait types. Paul Randal in his post Wait statistics, or please tell me where it hurts said: A thread is using the CPU (called RUNNING) until it needs to wait for a resource. It then moves to an unordered list of threads … Continue reading Wait wait wait…