Simon Riggs wrote:
We would keep a dynamic visibility map at *segment* level, showing which
segments have all rows as 100% visible. No freespace map data would be
held at this level.
Small dumb-user question.
I take it you've considered some more flexible consecutive-run-of-blocks
unit of flagging rather than file-segments. That obviously complicates
the tracking but means you can cope with infrequent updates as well as
mark most of the "most recent" segment for log-style tables.
--
Richard Huxton
Archonet Ltd
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
