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support/sql/database-engine/performance/resolve-pagelatch-ex-contention.md

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@@ -4,7 +4,7 @@ description: This article describes how to resolve last-page insert PAGELATCH_EX
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ms.author: jopilov
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author: PiJoCoder
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ms.reviewer: jopilov
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ms.date: 06/15/2023
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ms.date: 02/11/2025
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ms.custom: sap:SQL resource usage and configuration (CPU, Memory, Storage)
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---
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# Resolve last-page insert PAGELATCH_EX contention in SQL Server
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> [!div class="nextstepaction"]
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> [Open Notebook in Azure Data Studio](azuredatastudio://microsoft.notebook/open?url=https://raw.githubusercontent.com/microsoft/mssql-support/master/sample-scripts/DOCs-to-Notebooks/T-shooting_PagelatchEX_LastPageInsert.ipynb)
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### Option 2: Follow the steps manually
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### Option 2: Follow these steps manually
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To resolve this contention, the overall strategy is to prevent all concurrent INSERT operations from accessing the same database page. Instead, make each INSERT operation access a different page and increase concurrency. Therefore, any of the following methods that organize the data by a column other than the sequential column achieves this goal.
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You can use one of the following methods to resolve the issue. Choose the one that best fits your circumstances.
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##### Method 1: Use OPTIMIZE_FOR_SEQUENTIAL_KEY index option (SQL Server 2019 only)
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##### Method 1: Use OPTIMIZE_FOR_SEQUENTIAL_KEY index option (SQL Server 2019 and later versions)
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In SQL Server 2019, a new index option (`OPTIMIZE_FOR_SEQUENTIAL_KEY`) was added that can help resolve this issue without using any of the following methods. See [Behind the Scenes on OPTIMIZE_FOR_SEQUENTIAL_KEY](https://techcommunity.microsoft.com/t5/SQL-Server/Behind-the-Scenes-on-OPTIMIZE-FOR-SEQUENTIAL-KEY/ba-p/806888) for more information.
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