Top 10 SQL Server Wait Types Explained

In this episode, we break down the Top 10 most common SQL Server Wait Types—what they mean, why they matter, and how to fix them. Whether you’re seeing CXPACKET, PAGELATCH, or SOS_SCHEDULER_YIELD, we’ll help you decode the wait stats and improve performance fast.

Need expert help? Explore our SQL Server Managed Services: https://stedmansolutions.com/managed-services/
Monitor waits with Database Health Monitor: http://DatabaseHealth.com

Watch Episode 16 here:

Understanding the Top 10 SQL Server Wait Types – What They Mean and How to Fix Them

One of the most powerful tools for SQL Server performance tuning is understanding wait statistics—and more specifically, knowing what your wait types are telling you.

Whenever SQL Server executes a task and has to pause—whether it’s waiting on a resource, another thread, or disk IO—it records a “wait.” Over time, these accumulate into patterns. By identifying the most common wait types in your environment, you can diagnose bottlenecks and dramatically improve performance.

In this post, we’ll walk through the Top 10 most common SQL Server wait types, what they usually indicate, and how to start addressing them.

1. CXPACKET

2. PAGEIOLATCH_SH

3. LCK_M_X

4. WRITELOG

5. ASYNC_NETWORK_IO

6. PREEMPTIVE_OLEDBOPS

7. IO_COMPLETION

8. LCK_M_S

9. SOS_SCHEDULER_YIELD

10. PAGELATCH

Pro Tip: Monitor Your Wait Stats Continuously

At Stedman Solutions, we help teams monitor and analyze their wait stats using Database Health Monitor—a free tool I built specifically for SQL Server performance insights. It tracks wait stats over time, so you’re not just reacting to problems—you’re proactively spotting trends before they become outages.

When to Call for Help

You don’t have to tackle SQL Server performance issues alone. Many teams we work with had no idea how much performance they were losing to unresolved waits.

With SQL Server Managed Services from Stedman Solutions, we provide:

Continuous monitoring (yes, with real alerting and human response)
Deep query and index tuning
Wait stat analysis and historical performance baselines
Unlimited support during business hours
Mentoring and knowledge sharing so your team learns too

Whether you’re dealing with unexplained slowdowns, growing pains, or just need another set of expert eyes, we can help.

Final Thoughts

Wait stats are one of the best ways to understand what SQL Server is struggling with—but only if you know how to read them. If your top wait types are waving red flags, don’t ignore them. Fixing them can improve performance system-wide.

Want help reviewing your wait stats or optimizing your server? Contact us here.

Don’t forget to check out all of our previous episodes in season one!

Stedman SQL Podcast Sn 2 Ep 16 Wait Types