Hey everyone, I'm looking to optimize query performance on a large PostgreSQL table (over 20 million rows). I've tried basic B‑tree indexes, but some queries still take >5 seconds. What advanced indexing strategies would you recommend? Should I look into GIN, GiST, or maybe partial indexes?
Partial indexes can be a game changer if you only query a subset of rows. For example, if you often filter on status = 'active', a partial index like CREATE INDEX idx_active ON table(col) WHERE status='active'; will be much smaller and faster.
For array columns or full‑text search, GIN indexes are definitely worth considering. GiST indexes work well with geometric data and range types. If your queries involve tsvector searches, GIN is the way to go.