From: | Selena Deckelmann <selena(at)chrisking(dot)com> |
---|---|
To: | pdxpug(at)postgresql(dot)org |
Subject: | Re: on-disk bitmap indexes |
Date: | 2006-10-10 17:59:13 |
Message-ID: | 906f8820aefa5cfa8bb36b7c1e6f8822@chrisking.com |
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Lists: | pdxpug |
On Sep 25, 2006, at 2:56 PM, Mark Wong wrote:
> I remember hearing some interest about on-disk bitmap indexes. In
> case no one has seen it, just wanted to forward a Greenplum
> presentation about their implementation that's been submitted to
> PostgreSQL:
>
> http://files.meetup.com/230033/BizgresOnDiskBitmapIndex.pdf
I finally read this today. The performance graphs are impressive. I
would like someone to explain slide #8 to me. I get the general idea
of binning data but I need some hand-holding on how the
equality/interval/range encoding works. The arrows are not doing much
for me.
-selena
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