我们的应用程序失败了几次，因为“ORA-01536：表空间超出了空间配额”，我们希望能够通过定期检查表空间上的可用空间并在它低于某个水平时发出警报来防止这种情况.
有没有办法找出表空间中剩余的可用空间？
经过一些研究（我不是 DBA），我尝试了以下方法：
select max_bytes-bytes from user_ts_quotas;
select sum(nvl(bytes,0)) from user_free_space;
但这些查询返回完全不同的结果。
问问题
336158 次
12 回答
103
我使用这个查询
column "Tablespace" format a13
column "Used MB" format 99,999,999
column "Free MB" format 99,999,999
column "Total MB" format 99,999,999
select
fs.tablespace_name "Tablespace",
(df.totalspace - fs.freespace) "Used MB",
fs.freespace "Free MB",
df.totalspace "Total MB",
round(100 * (fs.freespace / df.totalspace)) "Pct. Free"
from
(select
tablespace_name,
round(sum(bytes) / 1048576) TotalSpace
from
dba_data_files
group by
tablespace_name
) df,
(select
tablespace_name,
round(sum(bytes) / 1048576) FreeSpace
from
dba_free_space
group by
tablespace_name
) fs
where
df.tablespace_name = fs.tablespace_name;
于 2011-10-06T09:00:42.780 回答
33
更准确的 SQL 语句
SELECT a.tablespace_name,
ROUND (((c.BYTES - NVL (b.BYTES, 0)) / c.BYTES) * 100,2) percentage_used,
c.BYTES / 1024 / 1024 space_allocated,
ROUND (c.BYTES / 1024 / 1024 - NVL (b.BYTES, 0) / 1024 / 1024,2) space_used,
ROUND (NVL (b.BYTES, 0) / 1024 / 1024, 2) space_free,
c.DATAFILES
FROM dba_tablespaces a,
( SELECT tablespace_name,
SUM (BYTES) BYTES
FROM dba_free_space
GROUP BY tablespace_name
) b,
( SELECT COUNT (1) DATAFILES,
SUM (BYTES) BYTES,
tablespace_name
FROM dba_data_files
GROUP BY tablespace_name
) c
WHERE b.tablespace_name(+) = a.tablespace_name
AND c.tablespace_name(+) = a.tablespace_name
ORDER BY NVL (((c.BYTES - NVL (b.BYTES, 0)) / c.BYTES), 0) DESC;
于 2012-03-22T05:04:30.870 回答
15
检查大小的方法有很多，但是作为开发人员，我们没有太多访问元表的权限，我发现这个解决方案非常简单（注意：如果您收到错误消息 ORA-01653 'The ORA-01653 错误是由于您需要向表空间添加空间。'）
--Size of All Table Space
--1. Used Space
SELECT TABLESPACE_NAME,TO_CHAR(SUM(NVL(BYTES,0))/1024/1024/1024, '99,999,990.99') AS "USED SPACE(IN GB)" FROM USER_SEGMENTS GROUP BY TABLESPACE_NAME
--2. Free Space
SELECT TABLESPACE_NAME,TO_CHAR(SUM(NVL(BYTES,0))/1024/1024/1024, '99,999,990.99') AS "FREE SPACE(IN GB)" FROM USER_FREE_SPACE GROUP BY TABLESPACE_NAME
--3. Both Free & Used
SELECT USED.TABLESPACE_NAME, USED.USED_BYTES AS "USED SPACE(IN GB)", FREE.FREE_BYTES AS "FREE SPACE(IN GB)"
FROM
(SELECT TABLESPACE_NAME,TO_CHAR(SUM(NVL(BYTES,0))/1024/1024/1024, '99,999,990.99') AS USED_BYTES FROM USER_SEGMENTS GROUP BY TABLESPACE_NAME) USED
INNER JOIN
(SELECT TABLESPACE_NAME,TO_CHAR(SUM(NVL(BYTES,0))/1024/1024/1024, '99,999,990.99') AS FREE_BYTES FROM USER_FREE_SPACE GROUP BY TABLESPACE_NAME) FREE
ON (USED.TABLESPACE_NAME = FREE.TABLESPACE_NAME);
谢谢
于 2014-12-04T06:32:21.410 回答
12
这是我遇到的最简单的查询之一，我们也用它来监控：
SELECT TABLESPACE_NAME,SUM(BYTES)/1024/1024/1024 "FREE SPACE(GB)"
FROM DBA_FREE_SPACE GROUP BY TABLESPACE_NAME;
关于Oracle表空间的完整文章： 表空间
于 2013-02-25T12:09:08.437 回答
2
以下查询将有助于找出以 MB 为单位的表空间的可用空间：
select tablespace_name , sum(bytes)/1024/1024 from dba_free_space group by tablespacE_name order by 1;
于 2020-08-19T17:53:22.530 回答
2
这也很好
clear breaks
clear computes
Prompt
Prompt Tablespace Usage
Prompt
SET lines 120 pages 500
col percent_used format 999.99
SELECT a.TABLESPACE_NAME,
NVL(ROUND((a.BYTES /1024)/1024/1024,2),2) GB_TOTAL,
NVL(ROUND((b.BYTES /1024)/1024/1024,2),2) GB_FREE,
NVL(ROUND((b.largest/1024),2),0) KB_Chunk,
NVL(ROUND(((a.BYTES -NVL(b.BYTES,1))/a.BYTES)*100,4),0) percent_used
FROM
(SELECT TABLESPACE_NAME,
NVL(SUM(BYTES),0) BYTES
FROM dba_data_files
GROUP BY TABLESPACE_NAME
) a,
(SELECT TABLESPACE_NAME,
NVL(SUM(BYTES),1) BYTES ,
NVL(MAX(BYTES),1) largest
FROM dba_free_space
GROUP BY TABLESPACE_NAME
) b
WHERE a.TABLESPACE_NAME=b.TABLESPACE_NAME(+)
ORDER BY ((a.BYTES-b.BYTES)/a.BYTES) DESC;
输出
TABLESPACE_NAME GB_TOTAL GB_FREE KB_CHUNK PERCENT_USED
------------------------------ ---------- ---------- ---------- ------------
SYSTEM .84 .02 9216 97.36
SYSAUX .57 .05 32768 91.10
UNDOTBS1 .06 .05 36864 23.13
USERS 0 0 4096 20.00
于 2021-01-15T03:24:38.723 回答
1
除非我弄错了，否则上面的代码没有考虑未分配的空间，所以如果你真的想知道什么时候会达到硬限制，你应该使用 maxbytes。
我认为下面的代码可以做到这一点。它将可用空间计算为“可用空间”+ 未分配空间。
select
free.tablespace_name,
free.bytes,
reserv.maxbytes,
reserv.bytes,
reserv.maxbytes - reserv.bytes + free.bytes "max free bytes",
reserv.datafiles
from
(select tablespace_name, count(1) datafiles, sum(maxbytes) maxbytes, sum(bytes) bytes from dba_data_files group by tablespace_name) reserv,
(select tablespace_name, sum(bytes) bytes from dba_free_space group by tablespace_name) free
where free.tablespace_name = reserv.tablespace_name;
于 2016-04-25T07:42:35.303 回答
1
column pct_free format 999.99
select
used.tablespace_name,
(reserv.maxbytes - used.bytes)*100/reserv.maxbytes pct_free,
used.bytes/1024/1024/1024 used_gb,
reserv.maxbytes/1024/1024/1024 maxgb,
reserv.bytes/1024/1024/1024 gb,
(reserv.maxbytes - used.bytes)/1024/1024/1024 "max free bytes",
reserv.datafiles
from
(select tablespace_name, count(1) datafiles, sum(greatest(maxbytes,bytes)) maxbytes, sum(bytes) bytes from dba_data_files group by tablespace_name) reserv,
(select tablespace_name, sum(bytes) bytes from dba_segments group by tablespace_name) used
where used.tablespace_name = reserv.tablespace_name
order by 2
/
于 2017-01-13T21:19:05.853 回答
0
您还可以通过查看磁盘上文件的大小来大致了解表空间的使用情况。
我的数据库是用最大范围创建的，每个 dbf 文件只能增长到 32gigs - 所以当最后一个达到 32gigs 时，你知道你即将用完空间并需要添加另一个。
于 2019-02-09T07:54:16.943 回答
0
这是 Oracle SQL Developer 在其表空间视图中使用的查询
select a.tablespace_name as "Tablespace Name",
round(a.bytes_alloc / 1024 / 1024) "Allocated (MB)",
round(nvl(b.bytes_free, 0) / 1024 / 1024) "Free (MB)",
round((a.bytes_alloc - nvl(b.bytes_free, 0)) / 1024 / 1024) "Used (MB)",
round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100) "% Free",
100 - round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100) "% Used",
round(maxbytes/1024 / 1024) "Max. Bytes (MB)"
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 all
select
h.tablespace_name as tablespace_name,
round(sum(h.bytes_free + h.bytes_used) / 1048576) megs_alloc,
round(sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / 1048576) megs_free,
round(sum(nvl(p.bytes_used, 0))/ 1048576) megs_used,
round((sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / sum(h.bytes_used + h.bytes_free)) * 100) Pct_Free,
100 - round((sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / sum(h.bytes_used + h.bytes_free)) * 100) pct_used,
round(sum(f.maxbytes) / 1048576) max
from sys.v_$TEMP_SPACE_HEADER h, sys.v_$Temp_extent_pool p, dba_temp_files f
where p.file_id(+) = h.file_id
and p.tablespace_name(+) = h.tablespace_name
and f.file_id = h.file_id
and f.tablespace_name = h.tablespace_name
group by h.tablespace_name
ORDER BY 2;
于 2020-07-17T10:39:58.897 回答
0
您可以通过运行以下查询来检查表空间的可用空间：
SELECT DFQ.TABLESPACE_NAME "Tablespace Name"
,DFQ.TOTALSPACE "Total Size MB"
, (DFQ.TOTALSPACE - DSQ.TOTALUSEDSPACE) "Free Space MB"
,ROUND (100 * ( (DFQ.TOTALSPACE - DSQ.TOTALUSEDSPACE) / DFQ.TOTALSPACE)) || '%' "Free Space %" FROM (SELECT TABLESPACE_NAME, ROUND (SUM (BYTES) / 1048576) TOTALSPACE
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) DFQ
,(SELECT TABLESPACE_NAME, ROUND (SUM (BYTES) / (1024 * 1024)) TOTALUSEDSPACE
FROM DBA_SEGMENTS
GROUP BY TABLESPACE_NAME) DSQ WHERE DFQ.TABLESPACE_NAME = DSQ.TABLESPACE_NAME(+);
在上面的查询中，我们选择了每个表空间的总大小以及以 MB 为单位的可用空间以及占总大小百分比的可用空间。因此，您可以使用此百分比列来跟踪并在可用空间百分比达到 20% 或任何您想要的百分比时发出警报。
于 2021-04-09T23:46:04.683 回答
-2
您可以在这个有用的包中使用名为 tablespaces.sh 的脚本：http: //dba-tips.blogspot.com/2014/02/oracle-database-administration-scripts.html
于 2014-03-10T10:44:25.733 回答