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Increase system default settings -------------------------------- Params that configure max open connections. Edit /etc/sysctl.conf and add net.core.somaxconn=131072 fs.file-max=131072 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] do echo performance > $i/cpufreq/scaling_governor done xferlogs ---------- You need to gunzip the xferlogs before running any tests.
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