[Solved] Why can having too many indexes on a PostgreSQL table be harmful? — Ans: Because each index slows down write operations and uses extra disk space | PostgreSQL

PostgreSQL - Indexing Strategies

Why can having too many indexes on a PostgreSQL table be harmful?

ABecause indexes cause data corruption

BBecause PostgreSQL limits the number of indexes to two per table

CBecause each index slows down write operations and uses extra disk space

DBecause indexes prevent SELECT queries from running

Step-by-Step Solution

Solution:

Step 1: Understand index overhead
Each index requires maintenance during INSERT, UPDATE, DELETE, slowing writes and consuming disk space.
Step 2: Analyze impact of many indexes
Too many indexes increase write latency and storage needs, harming overall performance.
Final Answer:
Because each index slows down write operations and uses extra disk space -> Option C
Quick Check:
Too many indexes = slower writes + more disk use [OK]

Quick Trick: Balance indexes to speed reads without slowing writes too much [OK]

Common Mistakes:

Master "Indexing Strategies" in PostgreSQL

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Why can having too many indexes on a PostgreSQL table be harmful?