3.5.1 Matrix Server Administration Guide

Chapter 8: Configure MxFS-Linux 173
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NIC Parameters
As a starting point, we recommend that you change only the settings
listed in the “General” section of the table. The adjustments in the
“Other” section should be made only if you have already set the OS
tuning parameters and the “General” NIC parameters and suspect that
your systems still have networking issues.
Name in /etc/sysctl.conf Location in /proc
net.core.rmem_max /proc/sys/net/core/rmem_max
net.core.wmem_max /proc/sys/net/core/wmem_max
net.ipv4.tcp_rmem /proc/sys/net/ipv4/tcp_rmem
net.ipv4.tcp_wmem /proc/sys/net/ipv4/tcp_wmem
net.ipv4.tcp_timestamps /proc/sys/net/ipv4/tcp_timestamps
net.ipv4.tcp_sack /proc/sys/net/ipv4/tcp_sack
net.core.rmem_default /proc/sys/net/core/rmem_default
net.core.wmem_default /proc/sys/net/core/wmem_default
net.core.optmem_max /proc/sys/net/core/optmem_max
net.core.netdev_max_backlog /proc/sys/net/core/netdev_max_backlog
Tuning Point OS Default Recommended
General:
Ethernet flow control
NIC flow control.
Enabled Disabled
Other:
TCP Segmentation Offload (TSO)
NIC feature that offloads data stream
conversion to NIC hardware.
Enabled Disabled
NIC transmit queue
Transmit queue length for network interface.
1000 5000