http://blog.xcski.com/2007/09/14/what-a-difference-an-index-makes Everything I used to bore people on newsgroups and mailing lists with, now in one inconvenient place. Sun, 12 Oct 2008 15:02:56 +0000 http://wordpress.org/?v=2.6.2 http://blog.xcski.com/2007/09/14/what-a-difference-an-index-makes#comment-50063 gordon Fri, 14 Sep 2007 16:28:33 +0000 http://blog.xcski.com/2007/09/14/what-a-difference-an-index-makes#comment-50063 I had a couple of 13 million row tables that I was working with a few years ago and found I had missed an index. Processing went from a solid 20-30 hours on a fairly beefy multi-processor machine to 10 minutes. Basically it stopped doing full table scans on every DML. I had a couple of 13 million row tables that I was working with a few years ago and found I had missed an index. Processing went from a solid 20-30 hours on a fairly beefy multi-processor machine to 10 minutes. Basically it stopped doing full table scans on every DML.

]]> http://blog.xcski.com/2007/09/14/what-a-difference-an-index-makes#comment-50021 Frank Ch. Eigler Fri, 14 Sep 2007 13:50:56 +0000 http://blog.xcski.com/2007/09/14/what-a-difference-an-index-makes#comment-50021 Yup, databases are one area where algorithmic complexity is tangible and can give several orders of magnitude of performance differences. Yup, databases are one area where algorithmic complexity is tangible and can give several orders of magnitude of performance differences.

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