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  1. how to specify undo tablespace for a PDB (instance) in RAC?

    Oct 9, 2018 · Our CDB using local undo tablespace for each PDB. I've create a new undo tablespace (in PDB1 session) and add it to an PDB instance, but when shutdown/startup PDB, all two instances …

  2. efficient way to reclaim free space in tablespace for 19c

    May 26, 2021 · Database Administration (MOSC) efficient way to reclaim free space in tablespace for 19c May 26, 2021 10:12PM 4 comments Answered

  3. Query to check tablespace usage — oracle-mosc

    May 27, 2022 · (select tablespace_name, round (sum (bytes)/1024/1024,2) free_mb from dba_free_space group by tablespace_name) f where t.tablespace_name=f.tablespace_name order …

  4. 2 undo tablespaces for Oracle rac 2 nodes pluggable database

    Mar 7, 2021 · I have oracle 19c rac on linux with 2 nodes and database 19c pluggable database; ive noticed the belowl some times when I issue show parameter undo i see that the default undo …

  5. How to migrate data from small file tablespace to bigfile tablespace ...

    Nov 8, 2017 · Hi All, How to migrate data from small file tablespace to bigfile tablespace. Actual requirement is to migrate the data from small file tablespace to bigfile tablespace with in the …

  6. Tablespace's Utilization Report from OEM 12c/13c — oracle-mosc

    Sep 7, 2022 · The below query does not provide accurate results for the Tablespace PCT_used. Need to correct this report to accurately reflect auto extensible tablespaces.

  7. Difference dba_tablespace_usage_metrics & dba_temp_free_space

    Sep 26, 2016 · Can you please explain me whet are the differences beetwen dba_tablespace_usage_metrics and dba_temp_free_space When i query those two views, for TEMP …

  8. How to reclaim free space on SYSAUX and shrink tablespace?

    Apr 1, 2022 · The SYSAUX tablespace needs to be defragmented due to plenty of free spaces(95%) Tried 1. shrink tablespace to smaller size and had ORA-03297 error. 2.

  9. how to shrink MGMT_TABLESPACE ? — oracle-mosc

    Nov 4, 2025 · EM Cloud Control is writing its data into mgmt_tablespace, which is getting bigger and bigger. I no longer have space on the filesystem to extend the datafile.

  10. BIGFILE datafile increase causes waits on 'enq: TT - contention'

    Jun 30, 2023 · If the tablespace has more than one datafile, then Oracle may be able to allocate the extent in another datafile without having to wait. Since a bigfile tablespace has only one datafile, …