Change default batch size so that it will work in lower memory environments.
Change default batch size so that it will work in lower memory environments.

nivertech/nfldb,bparafina/nfldb,verdimrc/nfldb,BurntSushi/nfldb,codeaudit/nfldb,nivertech/nfldb,bparafina/nfldb,verdimrc/nfldb,BurntSushi/nfldb,codeaudit/nfldb