https://lorbic.com/tags/sql/ Recent content in Sql on Lorbic Hugo en Fri, 31 Jul 2026 23:00:00 +0530 https://lorbic.com/couchbase-index-best-practices-performance-tuning/ Fri, 31 Jul 2026 23:00:00 +0530 https://lorbic.com/couchbase-index-best-practices-performance-tuning/ <p>Most Couchbase performance tickets I have seen end the same way: someone adds more nodes, the dashboard looks a little better for a week, and the same query shows up in the slow log a month later. The node count was never the problem. The index was.</p> <p>This is a working reference, not an essay. I already wrote <a href="https://lorbic.com/posts/what-couchbase-taught-me-about-system-thinking/">the reflective version</a> of what indexing in Couchbase teaches you about systems in general. This post skips the reflection and gets straight to the decisions: which index type to reach for, how to order composite keys, how to tell if a query is actually using what you built, and which four or five mistakes account for most of the slow queries you will ever debug. Couchbase&rsquo;s own <a href="https://developer.couchbase.com/tutorial-tuning-tips-and-advice/" target="_blank">tuning tutorial</a> is the primary source for the recommendations below. Every example runs against <code>travel-sample</code>, the sample bucket Couchbase ships with every install, so you can paste these into your own cluster and see the plan yourself.</p>