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Increase system default settings
Params that configure max open connections.
Edit /etc/sysctl.conf and add
then on the command line:
sudo sysctl -p
Edit /usr/include/linux/limits.h
NR_OPEN = 65536
Edit /etc/security/limits.conf
your_username soft nofile 65535
your_username hard nofile 65535
limits.conf is read at login, so you should be able to logout and back in for the new
limits to take effect.
As an alternative, you can run set_kernel.bash to set the kernel parameters at
runtime with even larger values:
echo "10152 65535" > /proc/sys/net/ipv4/ip_local_port_range
sysctl -w fs.file-max=128000
sysctl -w net.ipv4.tcp_keepalive_time=300
sysctl -w net.core.somaxconn=250000
sysctl -w net.ipv4.tcp_max_syn_backlog=2500
sysctl -w net.core.netdev_max_backlog=2500
ulimit -n 10240
Stop scaling frequency
CPU frequency scaling enables the operating system to scale the CPU speed up or
down in order to save power. You need to stop this before running any time
based tests.
#! /bin/bash
for i in /sys/devices/system/cpu/cpu[0-9]
echo performance > $i/cpufreq/scaling_governor
You need to gunzip the xferlogs before running any tests.