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如何计算Index Size

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A database index size estimator calculates how much disk space database indexes will consume based on the number of rows, indexed column sizes, and index type. Indexes speed up queries but consume 20–100% of the table size in additional storage; over-indexing slows write performance.

分步指南

  1. 1Determine indexed columns
  2. 2Calculate bytes per index entry
  3. 3Project total index size

例题解析

输入
1M rows, 3 indices, 8 bytes each
结果
~24MB total
Plus B-tree overhead

常见错误注意事项

  • Wrong parameters
  • Missing adjustments

常见问题

What does this calculator do?

Set parameters

How do I use this calculator?

Run calculation

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