Lately I called a DROP USER command - as this was a slow environment (and I once called this command on the same user previously) I expected it to take long time. The working hours passed by, I was observing it - it waited on the "db file sequential read", so I did not bother to check the db health at all - I went home.
The next day I saw the command failed with error, that there are no temporary files' space.
Seems I forgot to finish this note as Ivan Korac has pointed me. I do not remember correctly now, as it was some time ago. The finish is I've found somewhere a note about that (possibly on Metalink) with supposition to drop that user objects first - and I did a test for that. It showed that time for dropping a user without preparations is almost the same as dropping objects first (this one schema has really many of them) and drop empty schema afterwards.
One difference though is that dropping one object is faster after all. The lack of temporary files space was an additional issue which went along with my command by accident IIRC.
