diff options
| author | Bruce Momjian <bruce@momjian.us> | 2005-06-17 02:20:43 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-06-17 02:20:43 +0000 |
| commit | 1b618e50a6eb422b0cffec33ee78201c2dae9f8d (patch) | |
| tree | bd4ef50f64bafa17e7855b200b01430f3143907d /doc/TODO | |
| parent | a6c7e843da693695fabbd7891dabb7892703e45d (diff) | |
Add:
>
> * 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.
Diffstat (limited to 'doc/TODO')
| -rw-r--r-- | doc/TODO | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -2,7 +2,7 @@ PostgreSQL TODO List ==================== Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) -Last updated: Tue Jun 14 19:44:43 EDT 2005 +Last updated: Thu Jun 16 22:20:43 EDT 2005 The most recent version of this document can be viewed at http://www.postgresql.org/docs/faqs.TODO.html. @@ -800,6 +800,13 @@ Vacuum This allows vacuum to target specific pages for possible free space without requiring a sequential scan. +* 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-vacuum o Move into the backend code o Scan the buffer cache to find free space or use background writer |