Performance Tuning

Some Important settings for sysctl
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net.ipv4.tcp_window_scaling - toggles window scaling
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Misc TCP protocol
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net.ipv4.tcp_timestamps - toggles TCP timestamp support
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net.ipv4.tcp_sack - toggles SACK (Selective ACK) support
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TCP Memory Allocations - min/pressure/max
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net.ipv4.tcp_rmem - TCP read buffer - in bytes
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overriden by core.rmem_max
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net.ipv4.tcp_wmem - TCP write buffer - in bytes
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overridden by core/wmem_max
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net.ipv4.tcp_mem - TCP buffer space
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measured in pages, not bytes !