DB2 TRUNCATE command - DROP STORAGE option I performed action TRUNCATE TABLE TABLENAME IMMEDIATE; but I did not used DROP STORAGE option. I read that it is default option if it is not put.
It was not so big table regarding table space but I am still interested if command I executed released database disk space on the server or not? I am not able to conculde that based on current disk space.

I would like confirmation for this?
Also I would like to know did I have to do DB2 REORG for this table after the TRUNCATE?
You can use LIST TABLESPACES SHOW DETAIL to check the High Water Mark. If it still appears high, you can always issue an ALTER TABLESPACE &lt;tablespace&gt; REDUCE MAX (assuming you are on automatic storage). The commands for old-style DMS are a litte different.

I have another answer where I list that information