Spider Parameters These parameters control the operation of the Spider server: batch_mutation_threshold: 10000 Defines the maximum number of mutations a batch update will queue before flushing to the database. After the mutations are generated for each object in a batch update, Spider checks to see if this threshold has been met and flushes the current mutation batch if it has. Larger values improve performance by reducing Cassandra round trips, but they require larger API buffer sizes. The default is 10,000.