From d6e3bb63cb1f6b3a0695309b0a9acf219553ad9f Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Sat, 7 Apr 2007 02:48:16 +0000 Subject: Done: o -Support a smaller header for short variable-length fields --- doc/src/FAQ/TODO.html | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) (limited to 'doc/src') diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html index 1a8fcfb1be8..905585d4f83 100644 --- a/doc/src/FAQ/TODO.html +++ b/doc/src/FAQ/TODO.html @@ -8,7 +8,7 @@

PostgreSQL TODO List

Current maintainer: Bruce Momjian (bruce@momjian.us)
-Last updated: Wed Apr 4 22:08:46 EDT 2007 +Last updated: Fri Apr 6 22:48:08 EDT 2007

The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html. @@ -1273,14 +1273,7 @@ first. There is also a developer's wiki at

-Merge xmin/xmax/cmin/cmax back into three header fields

Consider ways of storing rows more compactly on disk

Support a smaller header for short variable-length fields? -
One idea is to create zero-or-one-byte-header versions - of varlena data types. In involves setting the high-bit and - 0-127 length in the single-byte header, or clear the high bit - and store the 7-bit ASCII value in the rest of the byte. - The small-header versions have no alignment requirements. - http://archives.postgresql.org/pgsql-hackers/2006-09/msg01372.php -
+
-Support a smaller header for short variable-length fields
Reduce the row header size?
Consider reducing on-disk varlena length from four to two because a heap row cannot be more than 64k in length -- cgit v1.2.3