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| author | Geir Storli <geirst@yahooinc.com> | 2023-08-11 13:16:11 +0000 |
|---|---|---|
| committer | Geir Storli <geirst@yahooinc.com> | 2023-08-15 13:47:49 +0000 |
| commit | 6fbe8e9a17f3bb90f8a8f539ad56308df601ac5b (patch) | |
| tree | a4ef9b7f073b3fe91f53bfdb7d8d38cf89375cd8 /searchlib/src/tests/ranksetup/ranksetup_test.cpp | |
| parent | 4902b1a4209eb26cfaa22c4527821be89566cc65 (diff) | |
Control the auto-adjustment of targetHits in ANN using post-filtering.
When searching the HNSW index in a post-filtering case,
targetHits is auto-adjusted in an effort to still expose targetHits hits to first-phase ranking after post-filtering.
The following formula is now used to ensure an upper bound of adjustedTargetHits,
avoiding that the search in the HNSW index takes too long.
adjustedTargetHits = min(targetHits / estimatedHitRatio, targetHits * targetHitsMaxAdjustmentFactor).
The target-hits-max-adjustment-factor can be set in a rank profile and overriden per query.
The value is in the range [1.0,inf], with the default being 20.0.
When setting this to 1.0, auto-adjustment of targetHits is effectively disabled.
Diffstat (limited to 'searchlib/src/tests/ranksetup/ranksetup_test.cpp')
| -rw-r--r-- | searchlib/src/tests/ranksetup/ranksetup_test.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/searchlib/src/tests/ranksetup/ranksetup_test.cpp b/searchlib/src/tests/ranksetup/ranksetup_test.cpp index 50d9d36f575..f708df0a862 100644 --- a/searchlib/src/tests/ranksetup/ranksetup_test.cpp +++ b/searchlib/src/tests/ranksetup/ranksetup_test.cpp @@ -533,6 +533,9 @@ void RankSetupTest::testRankSetup() env.getProperties().add(mutate::on_second_phase::Operation::NAME, "=7"); env.getProperties().add(mutate::on_summary::Attribute::NAME, "c"); env.getProperties().add(mutate::on_summary::Operation::NAME, "-=2"); + env.getProperties().add(matching::GlobalFilterLowerLimit::NAME, "0.3"); + env.getProperties().add(matching::GlobalFilterUpperLimit::NAME, "0.7"); + env.getProperties().add(matching::TargetHitsMaxAdjustmentFactor::NAME, "5.0"); RankSetup rs(_factory, env); EXPECT_FALSE(rs.has_match_features()); @@ -571,7 +574,9 @@ void RankSetupTest::testRankSetup() EXPECT_EQUAL(rs.getMutateOnSecondPhase()._operation, "=7"); EXPECT_EQUAL(rs.getMutateOnSummary()._attribute, "c"); EXPECT_EQUAL(rs.getMutateOnSummary()._operation, "-=2"); - + EXPECT_EQUAL(rs.get_global_filter_lower_limit(), 0.3); + EXPECT_EQUAL(rs.get_global_filter_upper_limit(), 0.7); + EXPECT_EQUAL(rs.get_target_hits_max_adjustment_factor(), 5.0); } bool |