By: Jonathan Kehayias
Lorrin, Distributed Replay allows you to take a replay trace captured from a production SQL Server instance, and then replay that workload using 1-16 clients against a single target SQL Server. It is...
View ArticleBy: Security – Database and Server Audits / Extended Events / Profiler ? «...
[…] http://www.sqlperformance.com/2012/10/sql-trace/observer-overhead-trace-extended-events […]
View ArticleBy: SQL Server Performance Guide - Part 3 - SpeedySQL
[…] If you’re wondering how much more lightweight, take a look at Jonathan Kehayias’s article. His results showed that Extended Events result in about 10% less overhead compared with a […]
View ArticleBy: who cares
I have no idea what world Microsoft is living in these days. Our processors are not the problem anymore. Most of our machines run with less than 20% of CPU power used during peak times. Server side...
View ArticleBy: Aaron Bertrand
To play devil's advocate, what about all of those folks who *do* have high-throughput systems where trace (and especially Profiler) can have a *very* dramatic and noticeable impact on the workload?
View ArticleBy: Calin
That is based on edition, right? Developer allows only 1 client, if I remember correctly from one of your modules delivered. I though it is worth mentioning.
View ArticleBy: GP Van Eron
Very well thought out, written and helpful article. Thanks for sharing!
View ArticleBy: A warning about Diagnostic Manager’s Query Monitor Feature in v9+ -...
[…] data collection, especially by third party software vendors. I’ve done a lot of performance tests comparing Extended Events to SQL Trace and Extended Events generally has lower performance impact...
View ArticleBy: Performance Monitoring for Analysis Services – Data Collection « byoBI.com
[…] you include, especially if you’re running the trace in a production environment, because of the observer overhead effect. This particular trace definition (shown above) includes everything you’ll...
View ArticleBy: Performance Monitoring for SSAS – Perfmon Counter Cheat Sheet « byoBI.com
[…] Jonathan Kehayias wrote a nice blog post on SQLPerformance.com showing a method for measuring observer overhead. While the post is focusing on the SQL Server database engine, the same technique can...
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