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Check SQL Server Plan Cache Pollution (II) in 45 Seconds, The "45 Seconds DBA Series" | Part 23

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Before we dive into today's topic, if you missed my previous post you can take a look at Check SQL Server Plan Cache Pollution (I) . 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. Check SQL Server Plan Cache Pollution (II) in 45 Seconds The "45 Seconds DBA Series" | Part 23 You fixed ad-hoc queries, but your server is still screaming? In this post, I’ll expose why even perfect parameterization can lead to "reuse toxicity" and massive CPU spikes. 🧠 TL;DR BOX ✔️ Parameterized Pollution: Cache pollution isn't just "too many plans"; it's also "the wrong plan reused everywhere." 💣 ✔️ Reuse Toxicity: A plan optimized for a single row is forced onto a million-row result set, killing p...
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Check SQL Server Plan Cache Pollution (I) in 45 Seconds, The "45 Seconds DBA Series" | Part 22

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Before we dive into today's topic, if you missed my previous post you can take a look at SQL SERVER “If SQL Server Errors Were Honest” - Sunday SQL Humor 😅 . 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. Check SQL Server Plan Cache Pollution (I) in 45 Seconds The "45 Seconds DBA Series" | Part 22 In this post, I’ll show you how "single-use" execution plans are silently hijacking your server's RAM and how to stop this memory waste in under a minute. 🧠 TL;DR BOX ✔️ Plan Cache Pollution occurs when non-parameterized queries create thousands of useless, single-use execution plans. 💣 ✔️ Memory Starvation: These plans steal space from the Buffer Pool, forcing data out of memory and increasing I/O. 📉 ...
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SQL SERVER “If SQL Server Errors Were Honest” - Sunday SQL Humor 😅

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Before we dive into today's topic, if you missed my previous post you can take a look at How to Manage Graphs in SQL Server.. Nodes, Edges and ...limits 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. SQL SERVER “If SQL Server Errors Were Honest” Sunday SQL Humor 😅 When SQL Server stops being polite and starts telling the truth 💣 ⚡ Intro Hi SQL SERVER Guys and Gals, Not every SQL Server lesson needs a 300-line execution plan or a 4-hour troubleshooting session. Sometimes the best way to remember critical database concepts is through humor. In this post, I’ll show you what SQL Server error messages would sound like if they were brutally honest. Because behind every timeout, deadlock, and transaction log disaster… there is usually a DBA story nobody wants to admit 😅 But be ready... tomorrow we will start again with deeper contents ... Op...
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How to Manage Graphs in SQL Server.. Nodes, Edges and ...limits

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Before we dive into today's topic, if you missed my previous post you can take a look at Why Cursors Kill Performance (and When They Don’t), The "45 Seconds DBA Series" | Part 21 . 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. How to Manage Graphs in SQL Server.. Nodes, Edges and ...limits Special: Graph Reality Check In this post, I’ll expose the structural limits of SQL Server Graph Tables. While the MATCH syntax looks like Cypher, the relational engine underneath creates bottlenecks that native graph DBs like Neo4j solved a decade ago. 🧠 TL;DR BOX ✔️ Graph-Relational Hybrid: SQL Server uses NODE and EDGE tables to store entities and relationships. ⚡ ✔️ The MATCH Limitation: You can't perform true multi-patt...
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Why Cursors Kill Performance (and When They Don’t), The "45 Seconds DBA Series" | Part 21

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Before we dive into today's topic, if you missed my previous post you can take a look at The Dangerous Truth About Scalar Functions in 45 Seconds, The "45 Seconds DBA Series" | Part 20 . 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. Why Cursors Kill Performance (and When They Don’t) The "45 Seconds DBA Series" | Part 21 In this post, I’ll expose why T-SQL cursors are often the primary cause of CPU spikes and blocking chains. Master the set-based mindset to unlock massive scalability! 🧠 TL;DR BOX ✔️ RBAR (Row-By-Agonizing-Row): Cursors execute procedural logic, destroying the power of the set-based optimizer. 💣 ✔️ High Overhead: Context switching between the engine and the cursor memory destroys throughpu...
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The Dangerous Truth About Scalar Functions in 45 Seconds, The "45 Seconds DBA Series" | Part 20

Before we dive into today's topic, if you missed my previous post you can take a look at SSMS 22.6.0 Is OUT! Review & Test! . 👉 If you found this deep-dive helpful, feel free to check out the ads—your support helps me keep creating high-quality SQL Server content for the community. The Dangerous Truth About Scalar Functions in 45 Seconds The "45 Seconds DBA Series" | Part 20 Scalar UDFs are the silent killers of SQL Server performance. In this post, I will reveal why they hide their true cost and how they turn a fast query into a row-by-row disaster. 🧠 TL;DR ✔️ Scalar UDFs force RBAR (Row-By-Agonizing-Row) execution, bypassing the set-based power of the optimizer. 💣 ✔️ Inhibits Parallelism: Traditional scalar functions force your entire query to run on a single thread. 🧵 ✔️ Hidden Costs: Execution plans ofte...
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