"Gnanakumar" <gnanam@zoniac.com> writes:
>> But still, if I query after performing heavy DML operations, I'm always
>> getting zero, even though there are INSERT/UPDATE/DELETE.
Is the stats collector actually running according to "ps"? If not, look
in the postmaster log to see why it failed (problems creating the
communication socket are the most common cause).
regards, tom lane