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> * Research storing only active XIDs in subtransaction cache

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`2`	`2`	`PostgreSQL TODO List`
`3`	`3`	`====================`
`4`	`4`	`Current maintainer:Bruce Momjian (bruce@momjian.us)`
`5`		`-Last updated:Thu Sep 1414:10:31 EDT 2006`
	`5`	`+Last updated:Thu Sep 1416:30:31 EDT 2006`
`6`	`6`
`7`	`7`	`The most recent version of this document can be viewed at`
`8`	`8`	`http://www.postgresql.org/docs/faqs.TODO.html.`
`@@ -1353,6 +1353,7 @@ Miscellaneous Performance`
`1353`	`1353`	`cmin/cmax pair and is stored in local memory. Another idea is to`
`1354`	`1354`	`store both cmin and cmax only in local memory.`
`1355`	`1355`
	`1356`	`+* Research storing only active XIDs in subtransaction cache`
`1356`	`1357`	`* Consider ways of storing rows more compactly on disk`
`1357`	`1358`
`1358`	`1359`	`o Reorder physical storage order to reduce padding?`

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`8`	`8`	`<bodybgcolor="#FFFFFF"text="#000000"link="#FF0000"vlink="#A00000"alink="#0000FF">`
`9`	`9`	`<h1><aname="section_1">PostgreSQL TODO List</a></h1>`
`10`	`10`	`<p>Current maintainer: Bruce Momjian (<ahref="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>`
`11`		`-Last updated: Thu Sep 1414:10:31 EDT 2006`
	`11`	`+Last updated: Thu Sep 1416:30:31 EDT 2006`
`12`	`12`	`</p>`
`13`	`13`	`<p>The most recent version of this document can be viewed at<br/>`
`14`	`14`	`<ahref="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.`
`@@ -1219,6 +1219,7 @@ <h1><a name="section_21">Miscellaneous Performance</a></h1>`
`1219`	`1219`	`cmin/cmax pair and is stored in local memory. Another idea is to`
`1220`	`1220`	`store both cmin and cmax only in local memory.`
`1221`	`1221`	`</p>`
	`1222`	`+</li><li>Research storing only active XIDs in subtransaction cache`
`1222`	`1223`	`</li><li>Consider ways of storing rows more compactly on disk`
`1223`	`1224`	`<ul>`
`1224`	`1225`	`<li>Reorder physical storage order to reduce padding?`

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