Class LogDocMergePolicy

  • public class LogDocMergePolicy
    extends LogMergePolicy
    This is a LogMergePolicy that measures size of a segment as the number of documents (not taking deletions into account).
    • Field Detail


        public static final int DEFAULT_MIN_MERGE_DOCS
        Default minimum segment size. @see setMinMergeDocs
        See Also:
        Constant Field Values
    • Constructor Detail

      • LogDocMergePolicy

        public LogDocMergePolicy()
        Sole constructor, setting all settings to their defaults.
    • Method Detail

      • setMinMergeDocs

        public void setMinMergeDocs​(int minMergeDocs)
        Sets the minimum size for the lowest level segments. Any segments below this size are considered to be on the same level (even if they vary drastically in size) and will be merged whenever there are mergeFactor of them. This effectively truncates the "long tail" of small segments that would otherwise be created into a single level. If you set this too large, it could greatly increase the merging cost during indexing (if you flush many small segments).
      • getMinMergeDocs

        public int getMinMergeDocs()
        Get the minimum size for a segment to remain un-merged.
        See Also: