"Sorin N. Ciolofan" <ciolofan@xxxxxxxxxxxx> writes: > It seems that the legacy application creates tables dynamically and the > number of the created tables depends on the size of the input of the > application. For the specific input which generated that error I've > estimated a number of created tables of about 4000. > Could be this the problem? If you have transactions that touch many of them within one transaction, then yup, you could be out of locktable space. Try increasing max_locks_per_transaction. regards, tom lane