SunOS 5.8 - I/O buffer size - how to determine?

[robwall7]

SunOS 5.8 Generic_108528-07 sun4u sparc SUNW,Ultra-60

I would like yo know the I/O buffer size for a Sun box. Is it 64KB, and how can I know for sure?

Thanks in advance
robwall7
think twice, hit enter once

 

[jimbopalmer]

The netstat command will show the size of your receive window for networking Rwind


# ndd -set /dev/tcp tcp_xmit_hiwat 65535
# ndd -set /dev/tcp tcp_recv_hiwat 65535
# ndd -set /dev/tcp tcp_cwnd_max 65534


are the commands (ndd only changes this til reboot)

http://docs.sun.com/ab2/coll.28.19/...oqt=Fast+ethernet&Ab2Lang=C&Ab2Enc=iso-8859-1

The one thing you can't give for your heart's desire is your heart. - Lois McMaster Bujold

 

[robwall7]

I am looking for the disk file I/O buffer size as a basis for tuning an ORACLE database. The ORACLE docs use 64KB as an example and I would like to confirm that for this box.

My Swind and Rwind are 32768 from netstat. Does that mirror the disk file I/O buffer size?

 

[jimbopalmer]

Nope, thet is the Network Send and Recieve buffers per connection The one thing you can't give for your heart's desire is your heart. - Lois McMaster Bujold