IBM pSeries 690 Service Manual page 800

If option 12 is selected when Not Applicable is on the screen, the system responds with Not
Applicable and redisplay the system information menu. The setup menu can be displayed after
the performance mode is set, which happens the first time the system is booted.
The default performance mode is set by the firmware during IPL. The default mode provides the
optimum performance for the hardware configuration of the system. The performance mode is
systemwide; it cannot be set on a per-partition basis.
You can override the default setting by using the performance mode setup menu. The performance
mode setup menu will be similar to the following:
Default Performance Mode: Large Commercial System optimization
1. Current Performance Mode:
Large Commercial System optimization
98. Return to Previous Menu
0>1
Selecting option 1 displays the following performance modes:
Select from the following options:
1. Large Commercial System optimization
2. Standard Operation
3. Turbo Database Mode
0>
Notes:
1. Some MCM configuration changes, such as going from an 8-way to a 24-way system, will cause the
default performance mode to change. This new setting will not be reflected in the menu until after
the system is rebooted with the new configuration.
2. If the NVRAM has been cleared, the default performance mode and the current performance mode
will indicate uninitialized.
To override the default setting, a brief description of each performance mode follows:
– Large Commercial System Optimization is the setting for systems that do not fall into the other two
categories, standard operation and turbo database mode. This setting provides the best performance
for most applications.
– Standard Operation optimizes the system for large memory bandwidth applications where minimal
sharing of data occurs and the likelihood of significant hardware data-prefetching exists.
– Turbo Database Mode optimizes system operation for environments where there is a large amount of
data sharing among processes running concurrently on the system.
v L3 Mode Menu
This function is not applicable to this system.
Remote I/O (RIO) Link Speed Set Up Menu
v
This option is used to change the speed of the RIO interface to external drawers. On this system,
setting this speed will have no effect on the system.
The hardware capability is detected and set by the system firmware during the boot process. If the
hardware capability is unitialized (after NVRAM is cleared), it will be set during the first boot and remain
set during subsequent boots.
The maximum RIO speed setting will remain uninitialized until set by the user.
780 Eserver pSeries 690 Service Guide