Hi,

I dropped an index on a table with 25M records today. The INDEX_LENGTH in information_schema.tables shrank from 3834642432 to 3215982592, ie. ~618Mb difference

The index was on an int(11) column.

That means each index key takes up ~618Mb/25M ~= 25 bytes but that doesn't sound right? Is that true, or is information_schema.tables unreliable or?

Thanks,

Morten




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