| From: | Decibel! <decibel(at)decibel(dot)org> |
|---|---|
| To: | Gokulakannan Somasundaram <gokul007(at)gmail(dot)com> |
| Cc: | "pgsql-hackers list" <pgsql-hackers(at)postgresql(dot)org>, pgsql-patches(at)postgresql(dot)org, "Andrew Dunstan" <andrew(at)dunslane(dot)net>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Simon Riggs" <simon(at)2ndquadrant(dot)com>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
| Subject: | Re: [HACKERS] Proposal for Null Bitmap Optimization(for TrailingNULLs) |
| Date: | 2007-12-21 23:13:54 |
| Message-ID: | 8488A285-D027-4467-8F66-A788887D0B3F@decibel.org |
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| Lists: | pgsql-hackers pgsql-patches |
On Dec 20, 2007, at 2:36 AM, Gokulakannan Somasundaram wrote:
> I checked it by creating a table with 10 columns on a 32 bit
> machine. i inserted 100,000 rows with trailing nulls and i observed
> savings of 400Kbytes.
That doesn't really tell us anything... how big was the table
originally? Also, testing on 64 bit would be interesting.
--
Decibel!, aka Jim C. Nasby, Database Architect decibel(at)decibel(dot)org
Give your computer some brain candy! www.distributed.net Team #1828
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