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< * Consider using MVCC to cache count(*) queries with no WHERE clause
> * Use a fixed row count and a +/- count with MVCC visibility rules
>   to allow fast COUNT(*) queries with no WHERE clause(?)
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Bruce Momjian 2003-10-04 18:19:57 +00:00
parent 0a14ffe5b5
commit ec1fbbb546
1 changed files with 4 additions and 3 deletions
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@ -1,6 +1,6 @@
TODO list for PostgreSQL TODO list for PostgreSQL
======================== ========================
Last updated: Mon Sep 29 17:41:25 EDT 2003 Last updated: Sat Oct 4 14:19:54 EDT 2003
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@ -388,7 +388,8 @@ Cache
* Make blind writes go through the file descriptor cache * Make blind writes go through the file descriptor cache
* Cache last known per-tuple offsets to speed long tuple access * Cache last known per-tuple offsets to speed long tuple access
* Automatically place fixed-width, NOT NULL columns first in a table * Automatically place fixed-width, NOT NULL columns first in a table
* Consider using MVCC to cache count(*) queries with no WHERE clause * Use a fixed row count and a +/- count with MVCC visibility rules
to allow fast COUNT(*) queries with no WHERE clause(?)
Vacuum Vacuum
@ -501,7 +502,7 @@ Source Code
* Acquire lock on a relation before building a relcache entry for it * Acquire lock on a relation before building a relcache entry for it
* Research interaction of setitimer() and sleep() used by statement_timeout * Research interaction of setitimer() and sleep() used by statement_timeout
* Add checks for fclose() failure * Add checks for fclose() failure
* Change CVS $Id: TODO,v 1.1141 2003/09/29 21:41:29 momjian Exp $ to $PostgreSQL: pgsql/doc/TODO,v 1.1141 2003/09/29 21:41:29 momjian Exp $ * Change CVS $Id: TODO,v 1.1142 2003/10/04 18:19:57 momjian Exp $ to $PostgreSQL: pgsql/doc/TODO,v 1.1142 2003/10/04 18:19:57 momjian Exp $
* Exit postmaster if postgresql.conf can not be opened * Exit postmaster if postgresql.conf can not be opened
* Rename /scripts directory because they are all C programs now * Rename /scripts directory because they are all C programs now
* Allow the regression tests to start postmaster with -i so the tests * Allow the regression tests to start postmaster with -i so the tests