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Re: Slow(er) Query Response
Posted by: Daniel Nichter
Date: November 16, 2004 07:34PM

Since MySQL is using the index to find where to start getting values (key = bygroupid), but is not using the index to actually get those values (not "Using index" in Extra) something may be wrong with your index. Under different conditions does it ever use index in Extra? You said there's 1.3 M records; perhaps there's not enough key buffer to hold all the indexes? What are the values of your key_reads and key_read_requests?

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