1. 环境: 表记录900w条;2. 使用:count(*), count(rowid), count(主键) 都需要30多秒3. 使用语句查看FSFI:select tablespace_name,sqrt(max(blocks)/sum(blocks))* (100/sqrt(sqrt(count(blocks)))) FSFI from dba_free_space group by tablespace_name order by 1;Oracle BBED(oracle block browser and editor tool)安装与使用Oracle 用户对表空间配额quota说明相关资讯 Oracle教程