PostgreSQL Indexing Secrets: Why Your Queries Are Slow
Most slow queries are not caused by SQL syntax alone. They are caused by missing, misaligned, or misleading indexes.
A
AjayRead the Plan
Before adding an index, read the execution plan. The plan tells you what PostgreSQL is really doing, not what you hope it is doing.
Match the Access Pattern
Indexes should reflect actual filter and sort behavior. Generic indexing is usually wasted indexing.
Avoid Index Bloat
Every index has a write cost. Good indexing is selective and intentional, not exhaustive.