TechHacker Noonabout 7 hours ago
Postgres Query Slow? Check Planning vs Execution Time
10 min read
PostgreSQL's EXPLAIN ANALYZE separates Planning Time from Execution Time, and misreading the split leads to wasted optimization. On a 500-partition table, planning took 62.9 ms versus 7.2 ms execution, with the planner reading 20,063 blocks versus 932 for execution. Indexes worsen planning problems; work_mem and storage layout fix execution ones.
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