87 lines
2.7 KiB
Bash
87 lines
2.7 KiB
Bash
#!/bin/bash
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# System-tune-up to remove system software restrictions on a huge load of connections.
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# Be aware that hardware/infrastructure resources are the most common limiters.
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#
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# SwITNet Ltd © - 2024, https://switnet.net/
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# GPLv3 or later.
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while getopts m: option
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do
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case "${option}"
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in
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m) MODE=${OPTARG};;
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\?) echo "Usage: sudo bash ./$0 [-m debug]" && exit;;
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esac
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done
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#DEBUG
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if [ "$MODE" = "debug" ]; then
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set -x
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fi
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#Check if user is root
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if ! [ "$(id -u)" = 0 ]; then
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echo "You need to be root or have privileges!"
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exit 0
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fi
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echo '
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#--------------------------------------------------
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# Starting system tune up configuration
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# for high performance
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#--------------------------------------------------
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'
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set_once_hash_comment() {
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if ! awk '!/^ *#/ && NF {print}' "$2"|grep -q "$(awk -F '=' '{print$1}' <<< "$1")" ; then
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echo "Setting $1 on $2..."
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echo "$1" | tee -a "$2"
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else
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echo "\"$(awk -F '=' '{print$1}' <<< "$1")\" seems already present, skipping setting this variable"
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fi
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}
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FSTAB=/etc/fstab
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##Disable swap
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swapoff -a
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sed -r '/\sswap\s/s/^#?/#/' -i "$FSTAB"
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##Alternative swap tuning (need more documentation).
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#vm.swappiness=5
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#vm.vfs_cache_pressure=50
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##Kernel
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#https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/tuning_and_optimizing_red_hat_enterprise_linux_for_oracle_9i_and_10g_databases/sect-oracle_9i_and_10g_tuning_guide-adjusting_network_settings-changing_network_kernel_settings
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sysctl -w net.core.rmem_default=262144
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sysctl -w net.core.wmem_default=262144
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sysctl -w net.core.rmem_max=262144
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sysctl -w net.core.wmem_max=262144
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set_once_hash_comment "net.core.rmem_default=262144" "/etc/sysctl.conf"
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set_once_hash_comment "net.core.wmem_default=262144" "/etc/sysctl.conf"
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set_once_hash_comment "net.core.rmem_max=262144" "/etc/sysctl.conf"
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set_once_hash_comment "net.core.wmem_max=262144" "/etc/sysctl.conf"
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#system
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#https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart
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set_once_hash_comment "DefaultLimitNOFILE=65000" "/etc/sysctl.conf"
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set_once_hash_comment "DefaultLimitNPROC=65000" "/etc/sysctl.conf"
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set_once_hash_comment "DefaultTasksMax=65000" "/etc/sysctl.conf"
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#https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_for_real_time/7/html/tuning_guide/reduce_tcp_performance_spikes
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sysctl -w net.ipv4.tcp_timestamps=0
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set_once_hash_comment "net.ipv4.tcp_timestamps=0" "/etc/sysctl.conf"
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#https://bugzilla.redhat.com/show_bug.cgi?id=1283676
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sysctl -w net.core.netdev_max_backlog=100000
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set_once_hash_comment "net.core.netdev_max_backlog=100000" "/etc/sysctl.conf"
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##nginx
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sed -i "s|worker_connections.*|worker_connections 2000;|" /etc/nginx/nginx.conf
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nginx -t
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#Missing docs
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#sysctl -w net.ipv4.tcp_low_latency=1
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echo "System tune up...
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Done!"
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