public void setMaxFilterCoverage(double maxFilterCoverage) {
        if ((maxFilterCoverage < 0.0) || (maxFilterCoverage > 1.0)) {
            throw new IllegalInputException("maxFilterCoverage must be in the range [0.0, 1.0]. It is " + maxFilterCoverage);
        }

        this.maxFilterCoverage = maxFilterCoverage;
    }
Sets the max hits to aim for producing in the match phase.
This must be set if an attribute value is set.
It should be set to a reasonable fraction of the total documents on each partition.
container-search/src/main/java/com/yahoo/search/query/ranking/MatchPhase.java