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From: Heikki Linnakangas <heikki@enterprisedb.com>
To: Pavan Deolasee <pavan.deolasee@gmail.com>
Cc: ITAGAKI Takahiro <itagaki.takahiro@oss.ntt.co.jp>
Cc: Martijn van Oosterhout <kleptog@svana.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Free space management within heap page
Date: Tue, 23 Jan 2007 10:49:44 +0000
Message-ID: <45B5E848.4060102@enterprisedb.com> (raw)
In-Reply-To: <2e78013d0701230230n4643a30ao91f0001854154fc2@mail.gmail.com>
References: <20070123084846.GC19527@svana.org>
	<2e78013d0701230103y1d587db9q6733adca0ca92ca0@mail.gmail.com>
	<20070123181802.55E1.ITAGAKI.TAKAHIRO@oss.ntt.co.jp>
	<45B5DEBF.3090200@enterprisedb.com>
	<2e78013d0701230230n4643a30ao91f0001854154fc2@mail.gmail.com>

Pavan Deolasee wrote:
> I thought that we can not reclaim the line pointers unless we remove the
> corresponding index entries as well. Isn't that the case ? If so, how would
> we reclaim the line pointers after the last used one ?

There might be index pointers to dead line pointers in the proposed 
truncation scheme, so those can't be reclaimed, but after the index 
pointers are removed and the line pointers are unused like they are 
today, they could be reclaimed.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com



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