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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2022-03-24 11:47:41 -0400 |
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| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2022-03-24 11:47:41 -0400 |
| commit | 0bd7af082ace135581bb13a6bd2d88e68c66a3e0 (patch) | |
| tree | 412ad873ef762b761baaab0577cb4d36b6c0a240 /src/backend/utils/cache/syscache.c | |
| parent | a47651447f01562dac2e007db03733e750d45b6b (diff) | |
| download | postgresql-0bd7af082ace135581bb13a6bd2d88e68c66a3e0.tar.gz postgresql-0bd7af082ace135581bb13a6bd2d88e68c66a3e0.zip | |
Invent recursive_worktable_factor GUC to replace hard-wired constant.
Up to now, the planner estimated the size of a recursive query's
worktable as 10 times the size of the non-recursive term. It's hard
to see how to do significantly better than that automatically, but
we can give users control over the multiplier to allow tuning for
specific use-cases. The default behavior remains the same.
Simon Riggs
Discussion: https://postgr.es/m/CANbhV-EuaLm4H3g0+BSTYHEGxJj3Kht0R+rJ8vT57Dejnh=_nA@mail.gmail.com
Diffstat (limited to 'src/backend/utils/cache/syscache.c')
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