ORACLE 查看表空间使用率

–1、查看表在那个表空间

 select tablespace_name,table_name from user_talbes where table_name='employ';

–2、获取用户的默认表空间

 select   username,   DEFAULT_TABLESPACE     from   dba_users where username='scott';

–3、查看表空间所有的文件

select * from dba_data_files where tablespace_name='USERS';SELECT Upper(F.TABLESPACE_NAME)         "表空间名",       D.TOT_GROOTTE_MB                 "表空间大小(M)",       D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",       To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')       || '%'                           "使用比",       F.TOTAL_BYTES                    "空闲空间(M)",       F.MAX_BYTES                      "最大块(M)"FROM   (SELECT TABLESPACE_NAME,               Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,               Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTES        FROM   SYS.DBA_FREE_SPACE        GROUP  BY TABLESPACE_NAME) F,       (SELECT DD.TABLESPACE_NAME,               Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MB        FROM   SYS.DBA_DATA_FILES DD        GROUP  BY DD.TABLESPACE_NAME) DWHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAMEORDER  BY 1

–查询表空间的free space

select 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;

–查询表空间的总容量

select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;

–查询表空间使用率

SELECT 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_PctFROM   (SELECT tablespace_name,               Sum(bytes) / 1024 / 1024 AS MB        FROM   dba_free_space        GROUP  BY tablespace_name) free,       (SELECT tablespace_name,               Sum(bytes) / 1024 / 1024 AS MB        FROM   dba_data_files        GROUP  BY tablespace_name) totalWHERE  free.tablespace_name = total.tablespace_name;

---

select tablespace_name,       max_gb,       used_gb,       round(100 * used_gb / max_gb) pct_used  from (select a.tablespace_name tablespace_name,               round((a.bytes_alloc - nvl(b.bytes_free, 0)) / power(2, 30),                     2) used_gb,               round(a.maxbytes / power(2, 30), 2) max_gb          from (select f.tablespace_name,                       sum(f.bytes) bytes_alloc,                       sum(decode(f.autoextensible,                                  'YES',                                  f.maxbytes,                                  'NO',                                  f.bytes)) maxbytes                  from dba_data_files f                 group by tablespace_name) a,               (select f.tablespace_name, sum(f.bytes) bytes_free                  from dba_free_space f                 group by tablespace_name) b         where a.tablespace_name = b.tablespace_name(+)        union allselect h.tablespace_name tablespace_name,               round(sum(nvl(p.bytes_used, 0)) / power(2, 30), 2) used_gb,               round(sum(decode(f.autoextensible,                                'YES',                                f.maxbytes,                                'NO',                                f.bytes)) / power(2, 30),                     2) max_gb          from v$temp_space_header h, v$temp_extent_pool p, dba_temp_files f         where p.file_id(+) = h.file_idand p.tablespace_name(+) = h.tablespace_name           and f.file_id = h.file_idand f.tablespace_name = h.tablespace_name         group by h.tablespace_name)order by 4;