Oracle undotbs usage

-- UNDO tablespace current usage / available space
SELECT a.TABLESPACE_NAME, SIZEMB, USAGEMB, (SIZEMB - USAGEMB) AS FREEMB
FROM (SELECT round(sum(BYTES) / 1e6) AS SIZEMB, b.TABLESPACE_NAME
      FROM DBA_DATA_FILES a, DBA_TABLESPACES b
      WHERE a.TABLESPACE_NAME = b.TABLESPACE_NAME AND b.CONTENTS LIKE 'UNDO'
      GROUP BY b.TABLESPACE_NAME) a,
     (SELECT c.TABLESPACE_NAME, sum(BYTES) / 1e6 AS USAGEMB
      FROM DBA_UNDO_EXTENTS c
      WHERE STATUS <> 'EXPIRED'
      GROUP BY c.TABLESPACE_NAME) b
WHERE a.TABLESPACE_NAME = b.TABLESPACE_NAME;

Source: smarttechways.com

Oracle undotbs usage

-- UNDOTBS usage per User:
SELECT u.TABLESPACE_NAME          AS TABLESPACE,
       s.USERNAME,
       u.STATUS,
       sum(u.BYTES) / 1024 / 1024 AS SUM_IN_MB,
       count(u.SEGMENT_NAME)      AS SEG_CNTS
FROM DBA_UNDO_EXTENTS u, V$TRANSACTION T, V$SESSION s
WHERE T.ADDR = s.TADDR
GROUP BY u.TABLESPACE_NAME, s.USERNAME, u.STATUS
ORDER BY 1, 2, 3;

Similar codes

0 vote136 views1 answer
Mysql select statement after index
SQL
10 votes146 views4 answers
Drop primary key
SQL
2 votes156 views1 answer
Sql server check for value in multiple columns
SQL
-2 votes204 views3 answers
How to fetch first 10 rows in sql
SQL
3 votes157 views2 answers
Tsql join multiple record in one string
SQL
0 vote185 views1 answer
SQL-Arten
SQL
0 vote154 views1 answer
Oracle sql date summer time
SQL
1 vote149 views1 answer
Mysql select utc time in eastern time
SQL
3 votes154 views1 answer
Kill mysql processlist in whose time more than 200
SQL
4 votes156 views2 answers
How to insert ip address in mysql using php
SQL