> we use nbackup only

> my gstat accept no parameter -list 

  It was a typo, i mean gfix of course

> The transaction was cancelled after DB shutdown -> Firebird restart -> DB online. Then also sweep takes

> effect.

  Then it was not a limbo transaction...

> BUT: Sinatica Monitor alarmed me again because every delete statement still generate millions

> of sequential reads.

  Consider to add some indices to satisfy WHERE condition in your DELETE statement

Regards,
Vlad