GENAI-4175 model restore old impression limit value (#1326)

rolf-moz · web-flow · commit ee3531318dff · 2026-03-17T20:22:32.000Z
* Restore value to what was previously

* fix

* remove print
diff --git a/merino/curated_recommendations/rankers/contextual_ranker.py b/merino/curated_recommendations/rankers/contextual_ranker.py
@@ -30,10 +30,11 @@
 )
 
 # We are still learning how to compute how many impressions before we can trust the ranker score completely.
-# Hard coding to the current global-us blended beta use for thompson sampling (20,000) matching, scaled up 40%
-# because the contexual job runs more frequently than the thompson sampling aggregation batch job.
+# Because Contexual ranking is an experiment, the value is somewhat arbitrary because the impression counts
+# we're looking at are total impressions and we care about impressions with the inferred interests. When
+# contexual is rolled out we can use a dynamic computed value based on daily impressions.
 
-CONTEXUAL_AVG_BETA_VALUE = 28000
+CONTEXUAL_AVG_BETA_VALUE = 12000
 CONTEXTAL_LIMIT_PERCENTAGE_ADJUSTMENT = (
     0.5  # Underscored items tend to scale higher, leading to too much fresh content
 )

Original file line number	Diff line number	Diff line change
`@@ -30,10 +30,11 @@`
`30`	`30`	`)`
`31`	`31`
`32`	`32`	`# We are still learning how to compute how many impressions before we can trust the ranker score completely.`
`33`		`-# Hard coding to the current global-us blended beta use for thompson sampling (20,000) matching, scaled up 40%`
`34`		`-# because the contexual job runs more frequently than the thompson sampling aggregation batch job.`
	`33`	`+# Because Contexual ranking is an experiment, the value is somewhat arbitrary because the impression counts`
	`34`	`+# we're looking at are total impressions and we care about impressions with the inferred interests. When`
	`35`	`+# contexual is rolled out we can use a dynamic computed value based on daily impressions.`
`35`	`36`
`36`		`-CONTEXUAL_AVG_BETA_VALUE = 28000`
	`37`	`+CONTEXUAL_AVG_BETA_VALUE = 12000`
`37`	`38`	`CONTEXTAL_LIMIT_PERCENTAGE_ADJUSTMENT = (`
`38`	`39`	`0.5 # Underscored items tend to scale higher, leading to too much fresh content`
`39`	`40`	`)`