Reimplement free-space-map management as per recent discussions.

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Adjustable threshold is gone in favor of keeping track of total requested
page storage and doling out proportional fractions to each relation
(with a minimum amount per relation, and some quantization of the results
to avoid thrashing with small changes in page counts).  Provide special-
case code for indexes so as not to waste space storing useless page
free space counts.  Restructure internal data storage to be a flat array
instead of list-of-chunks; this may cost a little more work in data
copying when reorganizing, but allows binary search to be used during
lookup_fsm_page_entry().

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This commit is contained in:

Tom Lane

2003-03-04 21:51:22 +00:00

parent a455c94257

commit 391eb5e5b6

10 changed files with 1165 additions and 741 deletions

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src/backend/storage/freespace/freespace.c

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