Srobin2020S · April 21, 2022 04:46
diff --git a/sysctl-proxmox-tune.conf b/sysctl-proxmox-tune.conf
 # allow that much active connections
 net.core.somaxconn = 256000

 # do less swap but not disable it
 vm.swappiness = 1

 # allow application request allocation of virtual memory
 # more than real RAM size (or OpenVZ/LXC limits)
 vm.overcommit_memory = 1

 net.core.netdev_max_backlog = 16000
 net.ipv4.tcp_max_syn_backlog = 32000
 net.ipv4.tcp_syncookies = 1

 net.unix.max_dgram_qlen = 1024

 # Don't need IPv6 for now
 # If you use IPv6 - comment this line
 net.ipv6.conf.all.disable_ipv6 = 1

 # Flush TIME_WAIT connections faster
 net.ipv4.tcp_fin_timeout = 10
 # same for nf_conntrac moule
 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 15

 # Increase ephermeral IP ports
 net.ipv4.ip_local_port_range = 10240    61000

 # https://www.serveradminblog.com/2011/02/neighbour-table-overflow-sysctl-conf-tunning/
 net.ipv4.neigh.default.gc_thresh1 = 1024
 net.ipv4.neigh.default.gc_thresh2 = 2048
 net.ipv4.neigh.default.gc_thresh3 = 4096

 # http://www.opennet.ru/opennews/art.shtml?num=44945
 net.ipv4.tcp_challenge_ack_limit = 9999

 # https://major.io/2008/12/03/reducing-inode-and-dentry-caches-to-keep-oom-killer-at-bay/
 vm.vfs_cache_pressure = 10000

 ##
 # Adjust vfs cache
 # https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
 # Decriase dirty cache to faster flush on disk
 vm.dirty_background_ratio = 5
 vm.dirty_ratio = 10
 # Only on Proxmox 3.x with OpenVZ
 ubc.dirty_ratio = 20
 ubc.dirty_background_ratio = 10

 # Don't slow network - save congestion window after idle
 # https://github.com/ton31337/tools/wiki/tcp_slow_start_after_idle---tcp_no_metrics_save-performance
 net.ipv4.tcp_slow_start_after_idle = 0

 # https://tweaked.io/guide/kernel/
 # Don't migrate processes between CPU cores too often
 kernel.sched_migration_cost_ns = 5000000
 # Kernel >= 2.6.38 (ie Proxmox 4+)
 kernel.sched_autogroup_enabled = 0
	# allow that much active connections
	net.core.somaxconn = 256000

	# do less swap but not disable it
	vm.swappiness = 1

	# allow application request allocation of virtual memory
	# more than real RAM size (or OpenVZ/LXC limits)
	vm.overcommit_memory = 1

	net.core.netdev_max_backlog = 16000
	net.ipv4.tcp_max_syn_backlog = 32000
	net.ipv4.tcp_syncookies = 1

	net.unix.max_dgram_qlen = 1024

	# Don't need IPv6 for now
	# If you use IPv6 - comment this line
	net.ipv6.conf.all.disable_ipv6 = 1

	# Flush TIME_WAIT connections faster
	net.ipv4.tcp_fin_timeout = 10
	# same for nf_conntrac moule
	net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 15

	# Increase ephermeral IP ports
	net.ipv4.ip_local_port_range = 10240 61000

	# https://www.serveradminblog.com/2011/02/neighbour-table-overflow-sysctl-conf-tunning/
	net.ipv4.neigh.default.gc_thresh1 = 1024
	net.ipv4.neigh.default.gc_thresh2 = 2048
	net.ipv4.neigh.default.gc_thresh3 = 4096

	# http://www.opennet.ru/opennews/art.shtml?num=44945
	net.ipv4.tcp_challenge_ack_limit = 9999

	# https://major.io/2008/12/03/reducing-inode-and-dentry-caches-to-keep-oom-killer-at-bay/
	vm.vfs_cache_pressure = 10000

	##
	# Adjust vfs cache
	# https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
	# Decriase dirty cache to faster flush on disk
	vm.dirty_background_ratio = 5
	vm.dirty_ratio = 10
	# Only on Proxmox 3.x with OpenVZ
	ubc.dirty_ratio = 20
	ubc.dirty_background_ratio = 10

	# Don't slow network - save congestion window after idle
	# https://github.com/ton31337/tools/wiki/tcp_slow_start_after_idle---tcp_no_metrics_save-performance
	net.ipv4.tcp_slow_start_after_idle = 0

	# https://tweaked.io/guide/kernel/
	# Don't migrate processes between CPU cores too often
	kernel.sched_migration_cost_ns = 5000000
	# Kernel >= 2.6.38 (ie Proxmox 4+)
	kernel.sched_autogroup_enabled = 0
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