correct math regarding batches.
correct math regarding batches.

icholy/leveldb,IMCG/levelDB,basho/leveldb,icholy/leveldb,IMCG/levelDB,basho/leveldb,tempbottle/leveldb-1,IMCG/levelDB,tempbottle/leveldb-1,tempbottle/leveldb-1,icholy/leveldb,basho/leveldb