Throughput problems with NFS

[David Rhodus]

On Sunday, October 12, 2003, at 12:20 AM, Matthew Dillon wrote:
    I don't understand.  An unacked segment should not present a 
problem.

    You may have to make that reserve scale by MTU.
This happens because Linux hangs onto the ack for the last segment of a
32K+header send for a while. Then the NFS server will not put anymore
data in the socket because of an soreserve with a size of 32kB+header, 
so
it waits for about 39mS until Linux finally sends the ack for the last
segment.

-DR