Optimizing Heavy Indexing Strategies in PostgreSQL 17 & Prisma 7

Why Indexing Matters

In high-traffic SaaS applications, unoptimized queries are the #1 cause of latency spikes. PostgreSQL offers a rich set of index types that, when used correctly, can cut query times by 95%.

B-Tree Indexes

B-Tree is the default index type and works well for equality and range queries. Always index foreign keys and frequently filtered columns.

CREATE INDEX idx_orders_status ON project_orders (status);
CREATE INDEX idx_orders_client ON project_orders (client_id, created_at DESC);

GIN Indexes for JSONB

For JSONB columns, GIN indexes allow fast key-value lookups across nested JSON structures.

Prisma Index Configuration

Define composite indexes in your schema for multi-column query optimization.

Covering Indexes

Covering indexes include all columns needed by a query, eliminating heap fetches entirely for maximum performance.

Conclusion

Always use EXPLAIN ANALYZE to verify index usage and identify sequential scans on large tables.