setDeletesPctAllowed

Sets the maximum percentage of doc id space taken by deleted docs. The denominator includes both active and deleted documents. Lower values make the index more space efficient at the expense of increased CPU and I/O activity. Values must be between 5 and 50. Default value is

When the maximum delete percentage is lowered, the indexing thread will call for merges more often, meaning that write amplification factor will be increased. Write amplification factor measures the number of times each document in the index is written. A higher write amplification factor will lead to higher CPU and I/O activity as indicated above.