| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: Improving free space usage (was: Reducing relation locking |
| Date: | 2006-03-04 05:02:06 |
| Message-ID: | 200603040502.k24526s29305@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Jim C. Nasby wrote:
> At the risk of editorializing...
>
> * Allow for tables with more than a certain percent of free space to
> force new tuple allocation in the last few pages to come only from the
> FSM (prefering the earliest pages), with the intention of allowing the
> table to shrink
That seems too confusing.
> I also believe there's also a second TODO:
>
> * Allow FSM page hand-out on tables to be influenced by the clustered
> index. This would help maintain cluster order.
How would FSM know how to do that? I added it with a question mark.
--
Bruce Momjian http://candle.pha.pa.us
SRA OSS, Inc. http://www.sraoss.com
+ If your life is a hard drive, Christ can be your backup. +
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