1. 05 Jun, 2006 2 commits
    • Tom Lane's avatar
      Increase the default value of cpu_index_tuple_cost from 0.001 to 0.005. · e4de635a
      Tom Lane authored
      This shouldn't affect simple indexscans much, while for bitmap scans that
      are touching a lot of index rows, this seems to bring the estimates more
      in line with reality.  Per recent discussion.
      e4de635a
    • Tom Lane's avatar
      Add a GUC parameter seq_page_cost, and use that everywhere we formerly · eed6c9ed
      Tom Lane authored
      assumed that a sequential page fetch has cost 1.0.  This patch doesn't
      in itself change the system's behavior at all, but it opens the door to
      people adopting other units of measurement for EXPLAIN costs.  Also, if
      we ever decide it's worth inventing per-tablespace access cost settings,
      this change provides a workable intellectual framework for that.
      eed6c9ed
  2. 04 Jun, 2006 5 commits
  3. 03 Jun, 2006 6 commits
  4. 02 Jun, 2006 3 commits
  5. 01 Jun, 2006 3 commits
  6. 31 May, 2006 10 commits
  7. 30 May, 2006 11 commits