Hi,
It's InnoDB on 5.0.51. The only thing I can think of that *may* be different about this is that this index used to be on a composite key (some_id, some_varchar) but then the VARCHAR column got dropped. Other than that, it's just a plain index on an INT(11).
Morten On Jun 16, 2009, at 5:51 AM, Andrew Braithwaite wrote:
Hi, Is your table MyISAM or InnoDB? Andrew -----Original Message----- From: Morten [mailto:my.li...@mac.com] Sent: 15 June 2009 21:23 To: mysql@lists.mysql.com Subject: The size of an index (INDEX_LENGTH) 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 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=andrew.braithwa...@lovefilm.com
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