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PostgreSQL Configuration Optimization

PostgreSQL Configuration Optimization

Memory

Only four values really matter:

  • shared-buffers: below 2GB: set it to 20% of full memory; below 32GB: 25% of your full memory.

  • work_mem: Start low at 32/64MB. Look for temporary file lines in logs. Then set it to 2-3x the largest temp file that you see. This setting can give a huge speed boost (if set properly).

  • maintenance_work_mem: Set it to 10% of system memory.

  • effective_cache_size: Only a hint to postgres. Just set it to the amount of filesystem cache available.

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