minio来自官方的内核优化参数

Posted 2021-09-02 rongfengliang-荣锋亮

内容来自github，还是比较有意义的

参考

#!/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

参考资料

https://github.com/minio/minio/tree/master/docs/deployment/kernel-tuning