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Add description for concurrent sequential scans:

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>   One possible implementation is to start sequential scans from the lowest
>   numbered buffer in the shared cache, and when reaching the end wrap
>   around to the beginning, rather than always starting sequential scans
>   at the start of the table.
This commit is contained in:
Bruce Momjian
2005-04-25 01:42:41 +00:00
parent 5b05185262
commit 7a4c34c97c
2 changed files with 11 additions and 2 deletions
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6
doc/TODO
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@ -2,7 +2,7 @@
PostgreSQL TODO List PostgreSQL TODO List
==================== ====================
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Sun Apr 24 08:39:04 EDT 2005 Last updated: Sun Apr 24 21:42:27 EDT 2005
The most recent version of this document can be viewed at The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html. http://www.postgresql.org/docs/faqs.TODO.html.
@ -740,6 +740,10 @@ Cache
* Allow sequential scans to take advantage of other concurrent * Allow sequential scans to take advantage of other concurrent
sequentiqal scans, also called "Synchronised Scanning" sequentiqal scans, also called "Synchronised Scanning"
One possible implementation is to start sequential scans from the lowest
numbered buffer in the shared cache, and when reaching the end wrap
around to the beginning, rather than always starting sequential scans
at the start of the table.
Vacuum Vacuum
====== ======

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doc/src/FAQ/TODO.html
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@ -8,7 +8,7 @@
<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF"> <body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
<h1><a name="section_1">PostgreSQL TODO List</a></h1> <h1><a name="section_1">PostgreSQL TODO List</a></h1>
<p>Current maintainer: Bruce Momjian (<a href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/> <p>Current maintainer: Bruce Momjian (<a href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/>
Last updated: Sun Apr 24 08:39:04 EDT 2005 Last updated: Sun Apr 24 21:42:27 EDT 2005
</p> </p>
<p>The most recent version of this document can be viewed at<br/> <p>The most recent version of this document can be viewed at<br/>
<a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>. <a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
@ -677,6 +677,11 @@ first.
</p> </p>
</li><li>Allow sequential scans to take advantage of other concurrent </li><li>Allow sequential scans to take advantage of other concurrent
sequentiqal scans, also called "Synchronised Scanning" sequentiqal scans, also called "Synchronised Scanning"
<p> One possible implementation is to start sequential scans from the lowest
numbered buffer in the shared cache, and when reaching the end wrap
around to the beginning, rather than always starting sequential scans
at the start of the table.
</p>
</li></ul> </li></ul>
<h1><a name="section_14">Vacuum</a></h1> <h1><a name="section_14">Vacuum</a></h1>