util o/14/1 doesn't have meaningful data; how to tell if AUTOETEND is ON

• Article Type: General
• Product: Aleph
• Product Version: 19.01

Description:
I see the suggestion in various Aleph documents to use util o/14/1 to check the space in our tablespaces, but it seems that the figures shown there are not correct. They seem too low, and tablespaces often appear in the "TABLESPACE_WITHOUT_FREE_SPACE" section but we never see any indication of a problem in the server logs or batch job logs.

Resolution:
If a tablespace has "AUTOEXTEND ON" specified for it, then Oracle will automatically create a new datafile when it runs out of space in the tablespace.

To see which datafiles have autoextend ON, you need to:

1. login to unix as the oracle user,

2. > sqlplus / as sysdba

3. SQL> select substr(file_name,1,50), AUTOEXTENSIBLE from dba_data_files;

If the tablespaces have AUTOEXTEND ON, then to determine whether there is sufficient space available, you must consider not only the freespace left in the tablespace as seen in util o/14/1, but the freespace (as seen in "df -k /xxxx") for the filesystem that the tablespace's datafiles reside on.