Github user PallaviSingh1992 commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/568#discussion_r97265941
--- Diff: docs/configuration-parameters.md ---
@@ -132,7 +132,7 @@ This section provides the details of all the
configurations required for CarbonD
| Parameter | Default Value | Description |
|---------------------------------------|---------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| high.cardinality.identify.enable | true | If the parameter is true, the
high cardinality columns of the dictionary code are automatically recognized
and these columns will not be used as global dictionary encoding. If the
parameter is false, all dictionary encoding columns are used as dictionary
encoding. The high cardinality column must meet the following requirements:
value of cardinality > configured value of high.cardinalityEqually, the value
of cardinality is higher than the threshold.value of cardinality/ row number x
100 > configured value of high.cardinality.row.count.percentageEqually, the
ratio of the cardinality value to data row number is higher than the configured
percentage. |
-| high.cardinality.threshold | 1000000 | Threshold to identify whether
high cardinality column.Configuration value formula: Value of cardinality >
configured value of high.cardinality. The minimum value is 10000. |
+| high.cardinality.threshold | 1000000 | Threshold to identify whether
high cardinality column.if columns of cardinality > the configured value, then
the columns don't do dictionary encoding. |
--- End diff --
replace
| high.cardinality.threshold | 1000000 | It is a threshold to identify high
cardinality of the column. If the value of column cardinality > the configured
value, then the column is excluded from dictionary encoding. |
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