https://www.professionaldev.dev/tags/indexes/Recent content in Indexes on Professional developerHugo -- gohugo.ioenMon, 19 Oct 2026 00:00:00 +0000https://www.professionaldev.dev/post/java/mssqlserver/fast_insert_part7/Mon, 19 Oct 2026 00:00:00 +0000https://www.professionaldev.dev/post/java/mssqlserver/fast_insert_part7/ <p>Every production table has indexes. Every INSERT has to maintain them. Add 5 non-clustered indexes to a table and the Bulk API — the fastest single-thread strategy — slows down <strong>7x</strong>. The other strategies converge: with enough indexes, the choice of insert strategy stops mattering because index maintenance dominates.</p> <p>But that's only the start. The surrounding <strong>table design decisions</strong> matter as much: row width, compression, columnstore, fill factor, GUID vs INT keys, change tracking, temporal history, JSON/XML indexes, statistics auto-update, encryption, and so on all impose their own INSERT tax — and some of them are <strong>counter-intuitive</strong> (compression makes inserts slower; stats OFF makes them slower; sparse columns are worse than nothing when filled).</p>