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SQL Server Always On Series - Troubleshooting Network Throughput with NTTTCP Tool @jbswiki #alwayson

🔍 Welcome to our comprehensive journey through SQL Server Always On troubleshooting! In this video, we delve deep into resolving some of the most perplexing challenges that Database Administrators often encounter in Always On Availability Groups. If you've ever been confounded by HADR_SYNC_COMMIT waits, suspected underlying network issues, or grappled with dauntingly huge log send queues, you're in the right place. Let's equip you with the tools and insights needed to conquer these hurdles.

🔗 Understanding HADR_SYNC_COMMIT Wait Type: Our exploration begins by unraveling the mysteries of the HADR_SYNC_COMMIT wait type. We dissect its impact on the synchronization process within SQL Server Always On environments, shedding light on why it's crucial to address promptly.

🚦 Navigating the Always On Landscape: Before we jump into troubleshooting, let's ensure we're all on the same page with a comprehensive overview of SQL Server Always On. We'll cover the fundamentals, highlighting its architecture, key components, and the intricate dance between primary and secondary replicas.

📊 Diagnosing Network Issues with NTTTCP: Now, meet our troubleshooting ally - NTTTCP. We guide you through the installation process, setting up sender and receiver endpoints, and leveraging NTTTCP to measure network throughput accurately. This step is crucial to ascertain whether your network infrastructure is living up to its promises.

💡 Spotting Network-Related Always On Availability Issues: Armed with NTTTCP, we embark on a journey to identify and resolve network-related hiccups that might be affecting your Always On Availability Groups. We explore common issues like low throughput and high latency, demonstrating how NTTTCP provides tangible evidence to pinpoint and address these concerns.

📈 Tackling the Log Send Queue Challenge: Log send queues can be formidable foes, but fear not! We demonstrate how NTTTCP can validate whether the bottleneck lies in your network. Uncover actionable insights to ensure a streamlined and responsive Always On environment.

🛠️ Practical Tips and Best Practices: Troubleshooting is an art, and we equip you with a toolbox of practical tips and best practices to navigate the complexities of Always On. From interpreting diagnostic data to collaborating effectively with your network team, these insights will empower you to make informed decisions.

🌐 Real-world Scenarios: Delve into real-world scenarios where troubleshooting prowess becomes paramount. We walk you through case studies, applying the troubleshooting techniques and tools discussed in this video to address specific challenges faced by SQL Server DBAs.

🚀 Empower Your SQL Server Always On Experience: Whether you're a seasoned DBA or just starting your journey with Always On, this video is your compass to troubleshoot network-related issues with confidence. Optimize your SQL Server environment for peak performance and reliability, ensuring your databases remain resilient in the face of challenges.

🔔 Stay Connected: Don't miss out on the next installments in our SQL Server Always On series. Like, subscribe, and hit the notification bell to stay updated on our latest content. Let's navigate the complexities of SQL Server Always On together! 💪 #SQLServer #AlwaysOn #networktroubleshooting

On the receiver VM, create a Windows Firewall allow rule to allow the NTTTCP traffic to arrive. It's easier to allow nttcp.exe by name than to allow specific inbound TCP ports.

netsh advfirewall firewall add rule program=c:\tools\ntttcp.exe name="ntttcp" protocol=any dir=in action=allow enable=yes profile=ANY

Secondary
ntttcp -r -m 2,*,[receiver IP address-192.168.1.4] -t 300

Primary
ntttcp -s -m 2,*,[receiver IP address-192.168.1.4] -t 300