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PostgreSQL TODO List
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====================
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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- Last updated: Fri Jun 17 09:47:23 EDT 2005
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+ Last updated: Fri Jun 17 15:20:21 EDT 2005
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The most recent version of this document can be viewed at
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http://www.postgresql.org/docs/faqs.TODO.html.
@@ -800,15 +800,15 @@ Vacuum
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This allows vacuum to target specific pages for possible free space
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without requiring a sequential scan.
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+ * Auto-fill the free space map by scanning the buffer cache or by
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+ checking pages written by the background writer
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* Create a bitmap of pages that need vacuuming
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Instead of sequentially scanning the entire table, have the background
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writer or some other process record pages that have expired rows, then
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VACUUM can look at just those pages rather than the entire table. In
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the event of a system crash, the bitmap would probably be invalidated.
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- * Auto-fill the free space map by scanning the buffer cache or by
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- checking pages written by the background writer
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* Auto-vacuum
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o Move into the backend code
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o Use free-space map information to guide refilling
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< body bgcolor ="#FFFFFF " text ="#000000 " link ="#FF0000 " vlink ="#A00000 " alink ="#0000FF ">
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< h1 > < a name ="section_1 "> PostgreSQL TODO List</ a > </ h1 >
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< p > Current maintainer: Bruce Momjian (< a href ="mailto:pgman@candle.pha.pa.us "> pgman@candle.pha.pa.us</ a > )< br />
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- Last updated: Fri Jun 17 09:47:23 EDT 2005
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+ Last updated: Fri Jun 17 15:20:21 EDT 2005
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</ p >
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< p > The most recent version of this document can be viewed at< br />
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< a href ="http://www.postgresql.org/docs/faqs.TODO.html "> http://www.postgresql.org/docs/faqs.TODO.html</ a > .
@@ -736,14 +736,14 @@ <h1><a name="section_14">Vacuum</a></h1>
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< p > This allows vacuum to target specific pages for possible free space
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without requiring a sequential scan.
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</ p >
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+ </ li > < li > Auto-fill the free space map by scanning the buffer cache or by
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+ checking pages written by the background writer
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</ li > < li > Create a bitmap of pages that need vacuuming
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< p > Instead of sequentially scanning the entire table, have the background
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writer or some other process record pages that have expired rows, then
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VACUUM can look at just those pages rather than the entire table. In
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the event of a system crash, the bitmap would probably be invalidated.
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</ p >
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- </ li > < li > Auto-fill the free space map by scanning the buffer cache or by
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- checking pages written by the background writer
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</ li > < li > Auto-vacuum
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< ul >
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< li > Move into the backend code
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