{"id":78937,"date":"2026-11-10T19:43:05","date_gmt":"2026-11-10T19:43:05","guid":{"rendered":"http:\/\/bangla.sitestree.com\/?p=78937"},"modified":"2026-11-10T19:55:38","modified_gmt":"2026-11-10T19:55:38","slug":"rewritten-sql-server-69274","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=78937","title":{"rendered":"SQL Server Administration Study Notes: Performance, Cursors, Indexes, and Recovery"},"content":{"rendered":"<p>This study guide brings together major SQL Server administration concepts: measuring performance, using indexes, diagnosing slow queries, avoiding inefficient cursors, planning scalability, and protecting recoverability.<\/p>\n<h2>Performance investigation<\/h2>\n<p>Capture a reproducible slow query, its duration and logical reads, then inspect execution plans, Query Store, wait statistics, and appropriate dynamic management views. Establish baselines before tuning.<\/p>\n<h2>Queries and indexes<\/h2>\n<p>Retrieve only needed columns and rows, keep predicates sargable when possible, and create indexes based on observed query patterns. Every index adds storage and write overhead.<\/p>\n<h2>Cursor alternatives<\/h2>\n<p>A cursor loops through records; a set-based UPDATE, window function, or APPLY expression often expresses the same requirement more efficiently. If a cursor is unavoidable, restrict its input and clean up resources.<\/p>\n<h2>Availability versus recovery<\/h2>\n<p>Failover replicas and RAID improve certain availability scenarios but do not replace versioned backups. Plan restore tests, retention, log backup requirements, and clear recovery objectives.<\/p>\n<h2>Study checklist<\/h2>\n<p>Explain scaling up versus out; identify common wait categories; describe full, differential, and log backups; distinguish clustered and nonclustered indexes; and outline a measured tuning experiment.<\/p>\n<hr\/>\n<p><strong>AI, sources and reuse:<\/strong> This is an AI-generated rewrite informed by <a href=\"https:\/\/bangla.sitestree.com\/?p=69274\">the original Open Education post (#69274)<\/a>, with additional explanations and examples. The new article text may be copied, adapted, and republished with or without a reference to this site. Third-party resources and trademarks keep their own rights. <strong>AI can make mistakes.<\/strong> Verify version support, code correctness, and security practices against Microsoft documentation, and test with nonproduction data first.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This study guide brings together major SQL Server administration concepts: measuring performance, using indexes, diagnosing slow queries, avoiding inefficient cursors, planning scalability, and protecting recoverability.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[20,182],"tags":[466],"class_list":["post-78937","post","type-post","status-publish","format-standard","hentry","category-information-technology","category---blog","tag-sql-server","item-wrap"],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":78948,"url":"http:\/\/bangla.sitestree.com\/?p=78948","url_meta":{"origin":78937,"position":0},"title":"Improving SQL Server Cursor Performance: Practical Options and Set-Based Alternatives","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"Cursors can become costly when they fetch many records and run additional queries inside a loop. Optimization therefore begins by asking whether row-by-row work is necessary at all.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78954,"url":"http:\/\/bangla.sitestree.com\/?p=78954","url_meta":{"origin":78937,"position":1},"title":"SQL Server Query Performance: A Repeatable Diagnosis and Optimization Checklist","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"Query speed is affected by schema design, query shape, indexes, server resources, and concurrency. A repeatable investigation is more reliable than applying generic tuning tips.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":69272,"url":"http:\/\/bangla.sitestree.com\/?p=69272","url_meta":{"origin":78937,"position":2},"title":"SQL Server Short-notes at JustEtc #38","author":"Author-Check- Article-or-Video","date":"August 16, 2021","format":false,"excerpt":"Query Optimization How to optimize query response time? SQL Server How to optimize SQL Server Cursors What are cursors? SQL Server Hints Scalability: SQL Server 2005 Scaling Out Dynamic Management Views SQL Server Database System Tuning SQL Server: Index SQL Server : Backups From: http:\/\/sitestree.com\/?p=5221 Categories:38Tags: Post Data:2012-10-04 19:57:27 Shop\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78941,"url":"http:\/\/bangla.sitestree.com\/?p=78941","url_meta":{"origin":78937,"position":3},"title":"SQL Server Indexes Explained: Clustered, Nonclustered, and Composite Keys","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"An index helps the SQL Server query optimizer find rows efficiently, but every index carries maintenance costs. Good index design begins with real workloads rather than indexing every column.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78942,"url":"http:\/\/bangla.sitestree.com\/?p=78942","url_meta":{"origin":78937,"position":4},"title":"SQL Server Performance Tuning: Hardware, Operating System, and Database Engine","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"Performance tuning spans multiple layers: server hardware, Windows configuration, SQL Server settings, schema design, SQL statements, and application access patterns.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":69274,"url":"http:\/\/bangla.sitestree.com\/?p=69274","url_meta":{"origin":78937,"position":5},"title":"SQL Server Short-notes at JustETC #38","author":"Author-Check- Article-or-Video","date":"August 16, 2021","format":false,"excerpt":"How to optimize query response time? How to optimize SQL Server Cursors What are cursors? SQL Server Hints Scalability: SQL Server 2005 Scaling Out Dynamic Management Views SQL Server Database System Tuning SQL Server: Index SQL Server : Backups SQL Server Short-notes at JustEtc SQL Server Short-notes at JustEtc From:\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78937"}],"version-history":[{"count":1,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78937\/revisions"}],"predecessor-version":[{"id":78999,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78937\/revisions\/78999"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78937"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}