General System Tuning for the NCA
In addition to setting the NCA parameters, you can do some general system
tuning to benefit NCA performance. If you are using Sun GigabitEthernet (ge driver), you should set the interface in interrupt mode for better
results.
For example, a system with 4 Gbytes of memory and booted under 64-bit
kernel should have the following parameters set in the /etc/system file. Use pagesize to determine your system's
page size.
set sq_max_size=0
set ge:ge_intr_mode=1
set nca:nca_conn_hash_size=82500
set nca:nca_conn_req_max_q=100000
set nca:nca_conn_req_max_q0=100000
set nca:nca_ppmax=393216
set nca:nca_vpmax=393216
|
sq_max_size
| Description | The depth of the syncq
(number of messages) before a destination streams queue generates a QFULL message.
|
| Default | 2 messages
|
| Range | 1 to 0 (unlimited)
|
| Dynamic? | No
|
| When to Change | When NCA is running
on a system with a lot of memory, increase this parameter to allow drivers
to queue more packets of data. If a server is under heavy load, increase this
parameter so modules and drivers may process more data without dropping
packets or getting backlogged.
|
| Commitment Level | Unstable
|
ge:ge_intr_mode
| Description | Enables the ge driver to send packets directly to the upper communication layers
rather than queueing the packets.
|
| Default | 0 (queue packets to upper
layers)
|
| Range | 0 (enable) to 1 (disable)
|
| Dynamic? | No
|
| When to Change | When NCA is enabled,
set this parameter to 1 so that the packet is delivered to NCA in interrupt
mode for faster processing
|
| Commitment Level | Unstable
|
