Individual skill

django-db-performance

Diagnose and improve slow Django database-backed endpoints with evidence-first profiling, query-plan review, index selection, ORM loading fixes, batching, database-side computation, materialized views, and pagination choices. Use when a Django view, API, job, report, queryset, or database query is slow and the right optimization path is not obvious.

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License: Apache-2.0

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# Django DB Performance

Use this as the orchestration skill for Django database performance work. Start with measured evidence, reproduce the slow path, and route to the smallest optimization that changes the measured bottleneck.

## Core Workflow

1. Capture the symptom.
   - Identify the exact endpoint, command, task, report, or queryset.
   - Record current wall-clock time, query count, slow SQL, database backend, data volume, and Django version.
   - Keep the original request parameters or fixture that reproduces the issue.

2. Profile before changing code.
   - Use APM traces, database slow-query logs, Django Debug Toolbar, `connection.queries`, or targeted logging.
   - If the expensive query is known, use `QuerySet.explain()` or database `EXPLAIN`.