Cursor with hold for select takes too long

Hi team,
I am facing issues with cursor with hold for select.

If I execute select quaery without cursor it takes 13 seconds,
If execute it like
Begin;
Cursor "sql1" with hold for select.... ;fetch 100 to "sql1"
It takes more than 3 minutes.
Even sometimes it takes more than 10 minutes.

What could be the problem?
Request to help on this ASAP.
I am facing this issue on production.
I checked locks etc. But nothing like that.


Thanks & Regards
Bindra