Tcp/Ip Window And Buffer Sizes - Quantum SNC 4500 User Manual

TCP/IP Window and Buffer Sizes

The TCP/IP windows and buffer sizes controls the amount of data gathered together for processing. The
larger the window and buffer size, the less processing power required for processing the data.
Linux Configuration
The configuration of these parameters is through the "/proc" interface. For example, the following shell script
sets the window and I/O buffer sizes to 512K.
#!/bin/sh
MAX_BUF=524288
echo "Configuring socket parameters TO 512k "
echo "4096 $MAX_BUF $MAX_BUF" > /proc/sys/net/ipv4/tcp_rmem
echo "4096 $MAX_BUF $MAX_BUF" > /proc/sys/net/ipv4/tcp_wmem
echo $MAX_BUF > /proc/sys/net/core/rmem_max
echo $MAX_BUF > /proc/sys/net/core/rmem_default
echo $MAX_BUF > /proc/sys/net/core/wmem_max
echo $MAX_BUF > /proc/sys/net/core/wmem_default
Detailed information on Linux TCP/IP performance tuning is available in the Linux kernel source tree. Refer
to the file
LINUX-SOURCE_DIR/Documentation/networking/ip-sysctl.txt
Consult your operating system manuals for TCP/IP network parameter administration.
The TCP/IP standard allows maximum window sizes to be set to 64K, unless scalable windows are
supported.
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