查看表空间使用情况(SQL)
1: --查询表空间使用情况
2: SELECT Upper(F.TABLESPACE_NAME) "表空间名",
3: D.TOT_GROOTTE_MB "表空间大小(M)",
4: D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
5: To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')
6: || '%' "使用比",
7: F.TOTAL_BYTES "空闲空间(M)",
8: F.MAX_BYTES "最大块(M)",
9: D.AUTOEXTENSIBLE "是否自增长",
10: D.INCREMENTSIZE "自增长大小(M)"
11: FROM (SELECT TABLESPACE_NAME,
12: Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,
13: Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTES
14: FROM SYS.DBA_FREE_SPACE
15: GROUP BY TABLESPACE_NAME) F,
16: (SELECT DD.TABLESPACE_NAME,
17: Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MB,
18: AUTOEXTENSIBLE,
19: --INCREMENT_BY的单位是数据块的大小。数据块大小一般为默认8k
20: Round(INCREMENT_BY * (select value/1024 from v$parameter where name='db_block_size')/1024, 2) INCREMENTSIZE
21: FROM SYS.DBA_DATA_FILES DD
22: GROUP BY DD.TABLESPACE_NAME,AUTOEXTENSIBLE,INCREMENT_BY) D
23: WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
24: ORDER BY "表空间名"
显示结果如下:
参考:https://www.cnblogs.com/xwdreamer/p/3511047.html
自己进行了一些优化,根据表空间的创建时间进行排序。在优化时之所以没有使用三表直接联合查询(from a,b,c where a.xx=b.xx and b.xx=c.xx的方式),是为了提高查询效率。
SELECT Upper(A.TABLESPACE_NAME) "表空间名", D.TOT_GROOTTE_MB "表空间大小(M)", D.TOT_GROOTTE_MB - A.TOTAL_BYTES "已使用空间(M)", To_char(Round((D.TOT_GROOTTE_MB - A.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100, 2), '990.99') || '%' "使用比", A.TOTAL_BYTES "空闲空间(M)", A.MAX_BYTES "最大块(M)", D.AUTOEXTENSIBLE "是否自增长", D.incrementSize "自增长大小(M)", D.CREATE_TIME "创建时间" FROM (select T.TABLESPACE_NAME, Round(Sum(T.BYTES) / (1024 * 1024), 2) AS TOTAL_BYTES, Round(Max(T.BYTES) / (1024 * 1024), 2) AS MAX_BYTES from SYS.DBA_FREE_SPACE t group by t.TABLESPACE_NAME) A, (SELECT B.autoextensible, Round(Sum(B.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB, Round(B.increment_by * (select value from v$parameter where name = 'db_block_size') / (1024 * 1024), 2) AS incrementSize,--自增长大小为数据库中数据块的个数,一个数据块一般为8k B.TABLESPACE_NAME, min(C.CREATION_TIME) CREATE_TIME--获取创建时间,如果有多个数据文件,获取到最初时间 FROM SYS.DBA_DATA_FILES B, v$DATAFILE C WHERE B.file_id = C.FILE# group by B.TABLESPACE_NAME, B.autoextensible, B.increment_by) D WHERE A.TABLESPACE_NAME = D.TABLESPACE_NAME order by D.CREATE_TIME;
显示结果如下:
增加使用该表空间的用户信息:
--1查询表空间以及其使用情况以及对应用户 select zzz.TABLESPACE_NAME "表空间名", zzz.TOT_GROOTTE_MB "表空间大小(M)", zzz.incrementSize "自增长大小(M)", zzz.use_percentage "使用比", zzz.CREATE_TIME "创建时间", xxx.all_users "用户名" from (SELECT A.TABLESPACE_NAME, D.TOT_GROOTTE_MB, D.TOT_GROOTTE_MB - A.TOTAL_BYTES, To_char(Round((D.TOT_GROOTTE_MB - A.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100, 2), '990.99') || '%' use_percentage, A.TOTAL_BYTES freesize, A.MAX_BYTES maxblock, D.AUTOEXTENSIBLE, D.incrementSize, D.CREATE_TIME FROM (select T.TABLESPACE_NAME, Round(Sum(T.BYTES) / (1024 * 1024), 2) AS TOTAL_BYTES, Round(Max(T.BYTES) / (1024 * 1024), 2) AS MAX_BYTES from SYS.DBA_FREE_SPACE t group by t.TABLESPACE_NAME) A, (SELECT B.autoextensible, Round(Sum(B.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB, Round(B.increment_by * (select value from v$parameter where name = 'db_block_size') / (1024 * 1024), 2) AS incrementSize, --自增长大小为数据库中数据块的个数,一个数据块一般为8k B.TABLESPACE_NAME, min(C.CREATION_TIME) CREATE_TIME --获取创建时间,如果有多个数据文件,获取到最初时间 FROM SYS.DBA_DATA_FILES B, v$DATAFILE C WHERE B.file_id = C.FILE# group by B.TABLESPACE_NAME, B.autoextensible, B.increment_by) D WHERE A.TABLESPACE_NAME = D.TABLESPACE_NAME order by D.CREATE_TIME) zzz left join (select t.default_tablespace, to_char(wmsys.wm_concat(username)) all_users from dba_users t group by t.default_tablespace) xxx on zzz.TABLESPACE_NAME = xxx.default_tablespace
写的比较急,没有进行仔细优化,希望大家多多指教!
posted on 2019-05-07 15:01 jingkunliu 阅读(10851) 评论(0) 编辑 收藏 举报