Barbara Stephenson <barbara@xxxxxxxxxxxxx> writes:
We will be consolidating from 4 databases to 2 and want to make sure that
these parameters are the only ones that need changing. Please advise.
Current Future
===== =====
Max_connection = 50 125
Shared_buffers = 16MB 48MB
You will need to make sure that the FSM size parameters are correct for
the combined databases, too.
Shouldn't we increase the max_locks_per_transaction from 64 to 100 or 128
since we have more than doubled the # of connections?
No, because the lock table size automatically scales with
max_connections. (Probably max_locks_per_transaction should have been
called max_locks_per_connection ...)
max_prepared_transaction is set at default of 5 which is says if we use it to
set it to max_connection.
Are you using prepared transactions at all? If not, I'd actually
recommend setting that to zero to make sure nobody creates a prepared
transaction accidentally. You do *not* want anyone doing PREPARE
TRANSACTION unless there's an XA manager or something in place to make
sure the prepared xact gets committed or rolled back reasonably soon.
regards, tom lane
