You created a GIN index on to_tsvector('english', content) but queries using to_tsvector('simple', content) are slow. Why?

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PostgreSQL - Full-Text Search

You created a GIN index on to_tsvector('english', content) but queries using to_tsvector('simple', content) are slow. Why?

AThe index type should be BTREE

BIndex was built with 'english' config, not 'simple'

CThe content column is empty

DGIN indexes do not support to_tsvector

Step-by-Step Solution

Solution:

Step 1: Check index configuration
The index uses 'english' config, so it matches only queries with 'english'.
Step 2: Understand config mismatch effect
Queries with 'simple' config don't use the index, causing slow scans.
Final Answer:
Index was built with 'english' config, not 'simple' -> Option B
Quick Check:
Config mismatch causes no index use [OK]

Quick Trick: Index and query configs must match for GIN use [OK]

Common Mistakes:

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