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

1 vote224 views1 answer
Create temporal table in sql
SQL
4 votes214 views1 answer
Oracle show error line number
SQL
0 vote182 views1 answer
Microsoft sql server management studio clear cache
SQL
1 vote231 views4 answers
Postgres extract date from timestamp
SQL
1 vote243 views1 answer
Psql autocomplete for mac brew install
SQL
0 vote231 views1 answer
Mysql change timestamp on update
SQL
0 vote224 views1 answer
Mysql group by derived column
SQL
1 vote258 views1 answer
Oracle dbms scheduler repeat interval every 5 minutes
SQL
3 votes238 views2 answers
Enter mysql command line
SQL
0 vote229 views4 answers
Sql year
SQL