> The default 32K window is too small for fast networks (fast ethernet and up, > or anything with longer latency like round robin setups). You can change it > using the /proc/sys/net/core/[rw]mem_{default,max} sysctls (see socket(7)) The results from more testing. We tried the following settings for the items rmem_default, rmem_max, etc. - 96k (98304) - 128k (131072) - 192k (196608) Values were the same on both systems under test. No significant changes in results. We saw the same kind of results [worst drop off at about 7200 byte messages, drop to about 10% expected throughput]. Should I try larger sizes [say 1meg] before giving up on this? Is there something else I can try such as settings for the congestion avoidance? Thanks. --Mark H Johnson <mailto:Mark_H_Johnson@raytheon.com> - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org