I am wondering if there is anything in the Solaris 10 configuration that I may be able to change to resolve a strange network performance issue I'm facing.
I have two Solaris 10 machines, both of which communicate with a 3rd. Between the first and third, I see the following network transfer performance:
me@sever_three:/var/adm> netio -t server_one
NETIO - Network Throughput Benchmark, Version 1.26
(C) 1997-2005 Kai Uwe Rommel
TCP connection established.
Packet size 1k bytes: 3652 KByte/s Tx, 3012 KByte/s Rx.
Packet size 2k bytes: 13977 KByte/s Tx, 10910 KByte/s Rx.
Packet size 4k bytes: 5604 KByte/s Tx, 14780 KByte/s Rx.
Packet size 8k bytes: 52212 KByte/s Tx, 30345 KByte/s Rx.
Packet size 16k bytes: 25432 KByte/s Tx, 38524 KByte/s Rx.
Packet size 32k bytes: 41940 KByte/s Tx, 52256 KByte/s Rx.
while to the second I see:
me@server_three:/var/adm> netio -t server_two
NETIO - Network Throughput Benchmark, Version 1.26
(C) 1997-2005 Kai Uwe Rommel
TCP connection established.
Packet size 1k bytes: 3804 KByte/s Tx, 400 KByte/s Rx.
Packet size 2k bytes: 16477 KByte/s Tx, 1349 KByte/s Rx.
Packet size 4k bytes: 76230 KByte/s Tx, 1384 KByte/s Rx.
Packet size 8k bytes: 33076 KByte/s Tx, 6782 KByte/s Rx.
Packet size 16k bytes: 108829 KByte/s Tx, 111466 KByte/s Rx.
Packet size 32k bytes: 112070 KByte/s Tx, 112098 KByte/s Rx.
Now, we are investigating cabling and routers, but I was wondering, is there any Solaris 10 configuration that might be throttling or otherwise impacting the performance of the second server (at the 1Kb packet size).
The machines are 1 hop distance from each other, directly connected through a router. Network statistics show no obvious errors, though if anyone has a good way to check let me know.
