查询Oracle表空间使用情况

参考文献

1. dba_free_space : reference_link_for_dba_free_space

2. dba_data_files : reference_link_for_dba_data_files

查询剩余表空间

SET lines 2000SET pagesize 2000SELECT tablespace_name,
       Count(*)                           AS extends,
       Round(Sum(bytes)  1024 / 1024, 2) AS mb,
       Sum(blocks)                        AS blocks
FROM   dba_free_space
GROUP  BY tablespace_name
ORDER  BY tablespace_name;

查询表空间总容量

SET lines 2000SET pagesize 2000SELECT tablespace_name,
       Round(Sum(user_bytes) / 1024 / 1024, 2) AS mb
FROM   dba_data_files
GROUP  BY tablespace_name
ORDER  BY tablespace_name;

查询表空间使用率

SET lines 2000SET pagesize 2000SELECT total.tablespace_name,
       Round(total.mb, 2)           AS total_mb,
       Round(total.mb - free.mb, 2) AS used_mb,
       Round(( 1 - free.mb / total.mb ) * 100, 2)
       || '%'                       AS used_pct
FROM   (SELECT tablespace_name,
               Sum(bytes) / 1024 / 1024 AS mb
        FROM   dba_free_space
        GROUP  BY tablespace_name) free,
       (SELECT tablespace_name,
               Sum(user_bytes) / 1024 / 1024 AS mb
        FROM   dba_data_files
        GROUP  BY tablespace_name) total
WHERE  free.tablespace_name = total.tablespace_name
ORDER  BY tablespace_name;