From b197623ed28995d8d511dcba778ad511f3dae6fa Mon Sep 17 00:00:00 2001
From: Harshavardhana <harsha@minio.io>
Date: Wed, 4 Jan 2023 01:33:40 -0800
Subject: [PATCH] remove unnecessary kernel-tuning docs (#16354)

---
 docs/deployment/kernel-tuning/README.md | 98 -------------------------
 docs/deployment/kernel-tuning/sysctl.sh | 87 ----------------------
 2 files changed, 185 deletions(-)
 delete mode 100644 docs/deployment/kernel-tuning/README.md
 delete mode 100755 docs/deployment/kernel-tuning/sysctl.sh

diff --git a/docs/deployment/kernel-tuning/README.md b/docs/deployment/kernel-tuning/README.md
deleted file mode 100644
index cae283133..000000000
--- a/docs/deployment/kernel-tuning/README.md
+++ /dev/null
@@ -1,98 +0,0 @@
-# Kernel Tuning for MinIO Production Deployment on Linux Servers [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/)
-
-List of kernel tuning recommendations for MinIO server deployments, a copy of this [script](https://github.com/minio/minio/blob/master/docs/deployment/kernel-tuning/sysctl.sh) is available here that can be applied on the servers.
-
-> NOTE: These are common recommendations on any Linux servers, users must be careful on any premature optimization.
-> These settings are not mandatory, these settings do not fix any hardware issues and should not be considered as an
-> alternative to boost performance to mask underlying hardware problems. Under all circumstances it is recommended
-> to perform this tuning only after performing benchmarks for the hardware with expected baseline results.
-
-```
-#!/bin/bash
-
-cat > sysctl.conf <<EOF
-# maximum number of open files/file descriptors
-fs.file-max = 4194303
-
-# use as little swap space as possible
-vm.swappiness = 1
-
-# prioritize application RAM against disk/swap cache
-vm.vfs_cache_pressure = 50
-
-# minimum free memory
-vm.min_free_kbytes = 1000000
-
-# follow mellanox best practices https://community.mellanox.com/s/article/linux-sysctl-tuning
-# the following changes are recommended for improving IPv4 traffic performance by Mellanox
-
-# disable the TCP timestamps option for better CPU utilization
-net.ipv4.tcp_timestamps = 0
-
-# enable the TCP selective acks option for better throughput
-net.ipv4.tcp_sack = 1
-
-# increase the maximum length of processor input queues
-net.core.netdev_max_backlog = 250000
-
-# increase the TCP maximum and default buffer sizes using setsockopt()
-net.core.rmem_max = 4194304
-net.core.wmem_max = 4194304
-net.core.rmem_default = 4194304
-net.core.wmem_default = 4194304
-net.core.optmem_max = 4194304
-
-# increase memory thresholds to prevent packet dropping:
-net.ipv4.tcp_rmem = "4096 87380 4194304"
-net.ipv4.tcp_wmem = "4096 65536 4194304"
-
-# enable low latency mode for TCP:
-net.ipv4.tcp_low_latency = 1
-
-# the following variable is used to tell the kernel how much of the socket buffer
-# space should be used for TCP window size, and how much to save for an application
-# buffer. A value of 1 means the socket buffer will be divided evenly between.
-# TCP windows size and application.
-net.ipv4.tcp_adv_win_scale = 1
-
-# maximum number of incoming connections
-net.core.somaxconn = 65535
-
-# maximum number of packets queued
-net.core.netdev_max_backlog = 10000
-
-# queue length of completely established sockets waiting for accept
-net.ipv4.tcp_max_syn_backlog = 4096
-
-# time to wait (seconds) for FIN packet
-net.ipv4.tcp_fin_timeout = 15
-
-# disable icmp send redirects
-net.ipv4.conf.all.send_redirects = 0
-
-# disable icmp accept redirect
-net.ipv4.conf.all.accept_redirects = 0
-
-# drop packets with LSR or SSR
-net.ipv4.conf.all.accept_source_route = 0
-
-# MTU discovery, only enable when ICMP blackhole detected
-net.ipv4.tcp_mtu_probing = 1
-
-EOF
-
-echo "Enabling system level tuning params"
-sysctl --quiet --load sysctl.conf && rm -f sysctl.conf
-
-# `Transparent Hugepage Support`*: This is a Linux kernel feature intended to improve
-# performance by making more efficient use of processor’s memory-mapping hardware.
-# But this may cause https://blogs.oracle.com/linux/performance-issues-with-transparent-huge-pages-thp
-# for non-optimized applications. As most Linux distributions set it to `enabled=always` by default,
-# we recommend changing this to `enabled=madvise`. This will allow applications optimized
-# for transparent hugepages to obtain the performance benefits, while preventing the
-# associated problems otherwise. Also, set `transparent_hugepage=madvise` on your kernel
-# command line (e.g. in /etc/default/grub) to persistently set this value.
-
-echo "Enabling THP madvise"
-echo madvise | sudo tee /sys/kernel/mm/transparent_hugepage/enabled
-```
diff --git a/docs/deployment/kernel-tuning/sysctl.sh b/docs/deployment/kernel-tuning/sysctl.sh
deleted file mode 100755
index 51e00d73f..000000000
--- a/docs/deployment/kernel-tuning/sysctl.sh
+++ /dev/null
@@ -1,87 +0,0 @@
-#!/bin/bash
-
-cat > sysctl.conf <<EOF
-# maximum number of open files/file descriptors
-fs.file-max = 4194303
-
-# use as little swap space as possible
-vm.swappiness = 1
-
-# prioritize application RAM against disk/swap cache
-vm.vfs_cache_pressure = 50
-
-# minimum free memory
-vm.min_free_kbytes = 1000000
-
-# follow mellanox best practices https://community.mellanox.com/s/article/linux-sysctl-tuning
-# the following changes are recommended for improving IPv4 traffic performance by Mellanox
-
-# disable the TCP timestamps option for better CPU utilization
-net.ipv4.tcp_timestamps = 0
-
-# enable the TCP selective acks option for better throughput
-net.ipv4.tcp_sack = 1
-
-# increase the maximum length of processor input queues
-net.core.netdev_max_backlog = 250000
-
-# increase the TCP maximum and default buffer sizes using setsockopt()
-net.core.rmem_max = 4194304
-net.core.wmem_max = 4194304
-net.core.rmem_default = 4194304
-net.core.wmem_default = 4194304
-net.core.optmem_max = 4194304
-
-# increase memory thresholds to prevent packet dropping:
-net.ipv4.tcp_rmem = 4096 87380 4194304
-net.ipv4.tcp_wmem = 4096 65536 4194304
-
-# enable low latency mode for TCP:
-net.ipv4.tcp_low_latency = 1
-
-# the following variable is used to tell the kernel how much of the socket buffer
-# space should be used for TCP window size, and how much to save for an application
-# buffer. A value of 1 means the socket buffer will be divided evenly between.
-# TCP windows size and application.
-net.ipv4.tcp_adv_win_scale = 1
-
-# maximum number of incoming connections
-net.core.somaxconn = 65535
-
-# maximum number of packets queued
-net.core.netdev_max_backlog = 10000
-
-# queue length of completely established sockets waiting for accept
-net.ipv4.tcp_max_syn_backlog = 4096
-
-# time to wait (seconds) for FIN packet
-net.ipv4.tcp_fin_timeout = 15
-
-# disable icmp send redirects
-net.ipv4.conf.all.send_redirects = 0
-
-# disable icmp accept redirect
-net.ipv4.conf.all.accept_redirects = 0
-
-# drop packets with LSR or SSR
-net.ipv4.conf.all.accept_source_route = 0
-
-# MTU discovery, only enable when ICMP blackhole detected
-net.ipv4.tcp_mtu_probing = 1
-
-EOF
-
-echo "Enabling system level tuning params"
-sysctl --quiet --load sysctl.conf && rm -f sysctl.conf
-
-# `Transparent Hugepage Support`*: This is a Linux kernel feature intended to improve
-# performance by making more efficient use of processor’s memory-mapping hardware.
-# But this may cause https://blogs.oracle.com/linux/performance-issues-with-transparent-huge-pages-thp
-# for non-optimized applications. As most Linux distributions set it to `enabled=always` by default,
-# we recommend changing this to `enabled=madvise`. This will allow applications optimized
-# for transparent hugepages to obtain the performance benefits, while preventing the
-# associated problems otherwise. Also, set `transparent_hugepage=madvise` on your kernel
-# command line (e.g. in /etc/default/grub) to persistently set this value.
-
-echo "Enabling THP madvise"
-echo madvise | sudo tee /sys/kernel/mm/transparent_hugepage/enabled