also, I am trying to generate 10053 trace but trace file is recorded for first few minutes and stopped recording any thing. This is the last line in my 10053 trace

Query block (9fffffffbc5535e0) unchanged
Query block (9fffffffbf3e7c48) before join elimination:
SQL:******* UNPARSED QUERY IS *******
Please note that the session is active since last 2 hours but no trace is generating.

Is the information about disk sorts not record in 10053 level 1?

Thanks,