If you need fulltext search, I've enjoyed using Sphinx and Lucene in the past. Is the column you want to do fulltext on 1 TB? 1 TB of RAM in 128 gig DIMMs is <$10k these days, so might as well get at least that much if you're running anything like the bills these guys are talking about.
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Sounds like you need a better index :-)
If you need fulltext search, I've enjoyed using Sphinx and Lucene in the past. Is the column you want to do fulltext on 1 TB? 1 TB of RAM in 128 gig DIMMs is <$10k these days, so might as well get at least that much if you're running anything like the bills these guys are talking about.