refactor: change default value for max-node-to-split-index

Author: AleksandrMatsko

config/config.go

@@ -223,7 +223,7 @@ type ClickHouse struct {
 
 	WildcardMinDistance   int  `toml:"wildcard-min-distance" json:"wildcard-min-distance" comment:"If a wildcard appears both at the start and the end of a plain query at a distance (in terms of nodes) less than wildcard-min-distance, then it will be discarded. This parameter can be used to discard expensive queries."`
 	TrySplitQuery         bool `toml:"try-split-query" json:"try-split-query" comment:"Plain queries like '{first,second}.custom.metric.*' are also a subject to wildcard-min-distance restriction. But can be split into 2 queries: 'first.custom.metric.*', 'second.custom.metric.*'."`
-	MaxNodeToSplitIndex   int  `toml:"max-node-to-split-index" json:"max-node-to-split-index" comment:"Used only if try-split-query is true. Query that contains list will be split if its (list) node index is less or equal to max-node-to-split-index."`
+	MaxNodeToSplitIndex   int  `toml:"max-node-to-split-index" json:"max-node-to-split-index" comment:"Used only if try-split-query is true. Query that contains list will be split if its (list) node index is less or equal to max-node-to-split-index. By default is 0"`
 	TagsMinInQuery        int  `toml:"tags-min-in-query" json:"tags-min-in-query" comment:"Minimum tags in seriesByTag query"`
 	TagsMinInAutocomplete int  `toml:"tags-min-in-autocomplete" json:"tags-min-in-autocomplete" comment:"Minimum tags in autocomplete query"`
 
@@ -403,7 +403,6 @@ func New() *Config {
 			InternalAggregation:  true,
 			FindLimiter:          limiter.NoopLimiter{},
 			TagsLimiter:          limiter.NoopLimiter{},
-			MaxNodeToSplitIndex:  -1,
 		},
 		Tags: Tags{
 			Threads:     1,

doc/config.md

@@ -315,8 +315,8 @@ Only one tag used as filter for index field Tag1, see graphite_tagged table [str
  wildcard-min-distance = 0
  # Plain queries like '{first,second}.custom.metric.*' are also a subject to wildcard-min-distance restriction. But can be split into 2 queries: 'first.custom.metric.*', 'second.custom.metric.*'.
  try-split-query = false
- # Used only if try-split-query is true. Query that contains list will be split if its node index is less or equal to max-node-to-split-index.
- max-node-to-split-index = -1
+ # Used only if try-split-query is true. Query that contains list will be split if its (list) node index is less or equal to max-node-to-split-index. By default is 0
+ max-node-to-split-index = 0
  # Minimum tags in seriesByTag query
  tags-min-in-query = 0
  # Minimum tags in autocomplete query