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busyboy77/kernel_tuning.md

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Created September 30, 2024 07:27
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  1. @brooksphilip brooksphilip renamed this gist Jul 31, 2023. 1 changed file with 0 additions and 0 deletions.
    0 readme.md → kernel_tuning.md
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  2. @brooksphilip brooksphilip created this gist Jul 31, 2023.
    54 changes: 54 additions & 0 deletions readme.md
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    ```bash
    echo " updating kernel settings"
    cat << EOF >> /etc/sysctl.conf
    # SWAP settings
    vm.swappiness=0
    vm.panic_on_oom=0
    vm.overcommit_memory=1
    kernel.panic=10
    kernel.panic_on_oops=1
    vm.max_map_count = 262144
    # Have a larger connection range available
    net.ipv4.ip_local_port_range=1024 65000
    # Increase max connection
    net.core.somaxconn=10000
    # Reuse closed sockets faster
    net.ipv4.tcp_tw_reuse=1
    net.ipv4.tcp_fin_timeout=15
    # The maximum number of "backlogged sockets". Default is 128.
    net.core.somaxconn=4096
    net.core.netdev_max_backlog=4096
    # 16MB per socket - which sounds like a lot,
    # but will virtually never consume that much.
    net.core.rmem_max=16777216
    net.core.wmem_max=16777216
    # Various network tunables
    net.ipv4.tcp_max_syn_backlog=20480
    net.ipv4.tcp_max_tw_buckets=400000
    net.ipv4.tcp_no_metrics_save=1
    net.ipv4.tcp_rmem=4096 87380 16777216
    net.ipv4.tcp_syn_retries=2
    net.ipv4.tcp_synack_retries=2
    net.ipv4.tcp_wmem=4096 65536 16777216
    # ARP cache settings for a highly loaded docker swarm
    net.ipv4.neigh.default.gc_thresh1=8096
    net.ipv4.neigh.default.gc_thresh2=12288
    net.ipv4.neigh.default.gc_thresh3=16384
    # ip_forward and tcp keepalive for iptables
    net.ipv4.tcp_keepalive_time=600
    net.ipv4.ip_forward=1
    # monitor file system events
    fs.inotify.max_user_instances=8192
    fs.inotify.max_user_watches=1048576
    EOF
    sysctl -p > /dev/null 2>&1
    ```