Sorry if this is a repeat, it's not clear to me whether my prior email
got through Majordomo.
Andrew Athan wrote:
Is the minimum TCP retransmit timer in 2.6 still 200ms ? We are
running a gigabit networking environment, and experiencing some packet
loss (I'm assuming due to noise). Due to the high performance nature
of our applications, a 200ms retransmit timer is just too long (from
an application perspective). Packet loss doesn't seem unacceptably
high, it's just that when it does, 200ms delay is just too much.
I am toying with the idea of reducing the RTO value used by linux
hosts in our network, as a way of reducing latency when errors do
occur. I'm assuming this may increase the number of unecessary
retransmissions, but since we are at about 5% utilization on the
network, that's probably ok. However, I definitely want to avoid
exciting other aspects of the TCP stack, such as slow start.
Can anyone comment on all of this?
Andrew Athan
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