diff options
| 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 /container-search/abi-spec.json | |
| 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 'container-search/abi-spec.json')
| -rw-r--r-- | container-search/abi-spec.json | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/container-search/abi-spec.json b/container-search/abi-spec.json index 0f440957dfd..cdb660f294a 100644 --- a/container-search/abi-spec.json +++ b/container-search/abi-spec.json @@ -6981,12 +6981,14 @@ "public java.lang.Integer getMinHitsPerThread()", "public java.lang.Double getPostFilterThreshold()", "public java.lang.Double getApproximateThreshold()", + "public java.lang.Double getTargetHitsMaxAdjustmentFactor()", "public void setTermwiselimit(double)", "public void setNumThreadsPerSearch(int)", "public void setNumSearchPartitions(int)", "public void setMinHitsPerThread(int)", "public void setPostFilterThreshold(double)", "public void setApproximateThreshold(double)", + "public void setTargetHitsMaxAdjustmentFactor(double)", "public void prepare(com.yahoo.search.query.ranking.RankProperties)", "public com.yahoo.search.query.ranking.Matching clone()", "public boolean equals(java.lang.Object)", @@ -7000,6 +7002,7 @@ "public static final java.lang.String MINHITSPERTHREAD", "public static final java.lang.String POST_FILTER_THRESHOLD", "public static final java.lang.String APPROXIMATE_THRESHOLD", + "public static final java.lang.String TARGET_HITS_MAX_ADJUSTMENT_FACTOR", "public java.lang.Double termwiseLimit" ] }, |