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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.

ステップバイステップガイド

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

解いた例

入力

1M rows, 3 indices, 8 bytes each

結果

~24MB total

Plus B-tree overhead

避けるべきよくある間違い

✕Wrong parameters
✕Missing adjustments

よくある質問

What does this calculator do?

Set parameters

How do I use this calculator?

Run calculation

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