SQL DBA Blog

Category: Microsoft SQL Server

Microsoft SQL Server Blog which includes troubleshooting, performance tuning, and database administration guides from an experienced SQL DBA, Peter Whyte.

  • Checking if Query Store is Enabled in SQL Server

    This post shares the simple steps and SQL queries to check if Query Store is enabled in SQL Server, and view its options for a database. The Query Store feature was introduced in SQL Server 2016 (13.x) and enabled by default in SQL Server 2022 (16.x), if created…

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  • SQL Server Performance Troubleshooting Scripts

    When your SQL Server starts to experience performance issues, it’s important to have tools at your disposal to quickly identify and address the root causes. One such tool is having a performance troubleshooting scripts that provides some insights into SQL Server’s current state; including worker threads, running queries,…

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  • Checking SQL Server Mirroring Health & Latency

    In this blog post I’m sharing info on how to check the health and latency of your Database Mirroring in SQL Server. Monitoring Database Mirroring latency in SQL Server is needed for maintaining database availability and ensuring quick failover readiness. As a DBA we should be monitoring this…

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  • SQL Server Replication Monitoring Scripts

    In this post I’m sharing scripts and tips that will help you monitor, identify and troubleshoot SQL Server Replication latency and issues. The following is included in this article: 1. Check Latency in Log Reader Agent. 2. Check Latency in Distribution Agent. 3. Check Undistributed Commands. 4. List…

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  • Get Last Node Blip in SQL Server FCI

    In a SQL Server Failover Cluster Instance (FCI) environment, a “node blip” refers to the event when the active SQL Server instance moves from one cluster node to another. This movement, typically triggered by a Failover or planned maintenance, causes a brief outage—usually 30 to 60 seconds. While…

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  • SQL Script to Get AAG Latency

    In this post, I’m sharing a script that I use frequently as a Production SQL DBA to check Always On Availability Group (AAG) latency. Always On Availability Groups (AAG) are a high-availability and disaster recovery solution in SQL Server, allowing you to synchronize databases across multiple replicas. These…

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  • SQL Server User Permissions Audit Script

    As a Production SQL DBA, checking user permissions is a task I handle frequently. Whether it’s for proactive audits, troubleshooting access issues, or responding to unexpected requests, having a quick and reliable way to verify user permissions is needed. One of the most useful tools I rely on…

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  • Creating SQL Logins on an Availability Group (AG) Environment

    In an Always On Availability Group (AG) environment, SQL logins must be configured with consistent Security Identifiers (SIDs) across all replicas to avoid issues like orphaned users and ensure seamless authentication during failovers. For Domain users in SQL, this sync’s automatically and we just need to create the…

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  • Keeping SQL Server and Critical Systems Up to Date

    Applying the latest patches to SQL Server, Windows OS, and underlying hardware is a vital part of maintaining secure, high-performing systems. For many organizations, this is done on a regular schedule—monthly, quarterly, or aligned with specific maintenance windows. However, for business-critical, 24/7 systems, patching takes extra planning and…

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Always On Availability Groups (AAG) (4) AWS (4) AWS Redshift (6) Database Admin (72) Database Backups & Recovery (14) Database Mirroring (2) Error Messages (5) Failover Cluster Instances (FCI) (1) Git Commands (6) Importing & Exporting Data (2) Linked Servers (3) Linux Administration (2) Logging & Monitoring (1) Microsoft Patching (2) MySQL (4) Postgres (6) PowerShell Scripts (2) SQL Certificates & Encryption (3) SQL Server Agent (5) SQL Server CDC (2) SQL Server Data Types (2) SQL Server Management Studio (SSMS) (17) SQL Server Networking (3) SQL Server on Linux (1) SQL Server Patching (2) SQL Server Performance Tuning (6) SQL Server Processes (SPIDs) (7) SQL Server Replication (2) SQL Server Scripts (13) SQL Server Security (4) SQL Server Storage (10) Windows Admin (20) Windows Authentication (2) Windows Automation (1) Windows Events (2) Windows Firewall (4) Windows Subsystem for Linux (WSL) (18)