PostgreSQL TODO List

====================

Current maintainer:Bruce Momjian (pgman@candle.pha.pa.us)

Last updated:Fri Jun 1709:47:23 EDT 2005

Last updated:Fri Jun 1715:20:21 EDT 2005

The most recent version of this document can be viewed at

http://www.postgresql.org/docs/faqs.TODO.html.

This allows vacuum to target specific pages for possible free space

without requiring a sequential scan.

* Auto-fill the free space map by scanning the buffer cache or by

checking pages written by the background writer

* Create a bitmap of pages that need vacuuming

Instead of sequentially scanning the entire table, have the background

writer or some other process record pages that have expired rows, then

VACUUM can look at just those pages rather than the entire table. In

the event of a system crash, the bitmap would probably be invalidated.

* Auto-fill the free space map by scanning the buffer cache or by

checking pages written by the background writer

* Auto-vacuum

o Move into the backend code

o Use free-space map information to guide refilling

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<h1><aname="section_1">PostgreSQL TODO List</a></h1>

<p>Current maintainer: Bruce Momjian (<ahref="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/>

Last updated: Fri Jun 1709:47:23 EDT 2005

Last updated: Fri Jun 1715:20:21 EDT 2005

<p>The most recent version of this document can be viewed at<br/>

<ahref="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.

<p> This allows vacuum to target specific pages for possible free space

without requiring a sequential scan.

</li><li>Auto-fill the free space map by scanning the buffer cache or by

checking pages written by the background writer

</li><li>Create a bitmap of pages that need vacuuming

<p> Instead of sequentially scanning the entire table, have the background

writer or some other process record pages that have expired rows, then

VACUUM can look at just those pages rather than the entire table. In

the event of a system crash, the bitmap would probably be invalidated.

</li><li>Auto-fill the free space map by scanning the buffer cache or by

checking pages written by the background writer

</li><li>Auto-vacuum

<li>Move into the backend code