oracle表空间的FSFI值过低

查询数据库的FSFI 得到如下值TABLESPACE_NAME                   FSFI
------------------------------ -------
CWMLITE                             56
DD                                1,00
DRSYS                             1,00
EXAMPLE                           1,00
INDX                              1,00
LICHENG                              4
SYSTEM                            1,00
TOOLS                             1,00
UNDOTBS                             23
USERS                             1,00其中licheng为我的表空间,其FSFI值为4
说明什么问题啊,求教各位