perftune

performance-tuning.sh

#!/usr/bin/env bash
#check_str=`grep "Advancity Server Performance Tuning Parameters" /etc/sysctl.conf`
#if [[ ! -z $check_str ]]; then echo 'Configuration already made in /etc/sysctl.conf'; exit; fi;

sysctl -a | grep -P "fs.file-max\
|net.ipv4.tcp_max_orphans|net.ipv4.tcp_no_metrics_save|net.ipv4.tcp_window_scaling\
|net.ipv4.tcp_timestamps|net.ipv4.tcp_sack|net.ipv4.tcp_max_syn_backlog|\
net.ipv4.tcp_congestion_control|net.ipv4.tcp_mtu_probing|net.ipv4.tcp_synack_retries|\
net.ipv4.ip_local_port_range|net.ipv4.tcp_rfc1337|net.ipv4.tcp_fin_timeout|\
net.core.somaxconn|net.core.netdev_max_backlog|net.core.optmem_max|net.ipv4.tcp_mem|\
net.ipv4.udp_mem|net.core.rmem_default|net.core.rmem_max|net.ipv4.tcp_rmem|\
net.ipv4.udp_rmem_min|net.core.wmem_default|net.core.wmem_max|net.ipv4.tcp_wmem|\
net.ipv4.udp_wmem_min|net.ipv4.tcp_max_tw_buckets|net.ipv4.tcp_tw_reuse" > linux-kernel-settings.backup

tee /etc/sysctl.d/z-advancity-tuning.conf << EOF
# Advancity Server Performance Tuning Parameters
#----------------------------------------------------
# Increase size of file handles and inode cache
# fs.file-max = 2097152

# tells the kernel how many TCP sockets that are not attached to any
# user file handle to maintain. In case this number is exceeded,
# orphaned connections are immediately reset and a warning is printed.
# net.ipv4.tcp_max_orphans = 60000

# Do not cache metrics on closing connections
net.ipv4.tcp_no_metrics_save = 1

# Turn on window scaling which can enlarge the transfer window:
net.ipv4.tcp_window_scaling = 1

# Enable timestamps as defined in RFC1323:
net.ipv4.tcp_timestamps = 1

# Enable select acknowledgments:
net.ipv4.tcp_sack = 1

# Maximum number of remembered connection requests, which did not yet
# receive an acknowledgment from connecting client.
net.ipv4.tcp_max_syn_backlog = 10240

# recommended default congestion control is htcp
net.ipv4.tcp_congestion_control=htcp

# recommended for hosts with jumbo frames enabled
net.ipv4.tcp_mtu_probing=1

# Number of times SYNACKs for passive TCP connection.
net.ipv4.tcp_synack_retries = 2

# Allowed local port range
net.ipv4.ip_local_port_range = 1024 65535

# Protect Against TCP Time-Wait
net.ipv4.tcp_rfc1337 = 1

# Decrease the time default value for tcp_fin_timeout connection
net.ipv4.tcp_fin_timeout = 15

# Increase number of incoming connections
# somaxconn defines the number of request_sock structures
# allocated per each listen call. The
# queue is persistent through the life of the listen socket.
net.core.somaxconn = 1024

# Increase number of incoming connections backlog queue
# Sets the maximum number of packets, queued on the INPUT
# side, when the interface receives packets faster than
# kernel can process them.
net.core.netdev_max_backlog = 65536

# Increase the maximum amount of option memory buffers
net.core.optmem_max = 25165824

# Increase the maximum total buffer-space allocatable
# This is measured in units of pages (4096 bytes)
net.ipv4.tcp_mem = 65536 131072 262144
net.ipv4.udp_mem = 65536 131072 262144

### Set the max OS send buffer size (wmem) and receive buffer
# size (rmem) to 12 MB for queues on all protocols. In other
# words set the amount of memory that is allocated for each
# TCP socket when it is opened or created while transferring files

# Default Socket Receive Buffer
net.core.rmem_default = 25165824

# Maximum Socket Receive Buffer
net.core.rmem_max = 25165824

# Increase the read-buffer space allocatable (minimum size,
# initial size, and maximum size in bytes)
net.ipv4.tcp_rmem = 20480 12582912 25165824
net.ipv4.udp_rmem_min = 16384

# Default Socket Send Buffer
net.core.wmem_default = 25165824

# Maximum Socket Send Buffer
net.core.wmem_max = 25165824

# Increase the write-buffer-space allocatable
net.ipv4.tcp_wmem = 20480 12582912 25165824
net.ipv4.udp_wmem_min = 16384

# Increase the tcp-time-wait buckets pool size to prevent simple DOS attacks
net.ipv4.tcp_max_tw_buckets = 1440000
# net.ipv4.tcp_tw_recycle can be problematic behind NAT
# net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
EOF

# load variables
sysctl -p /etc/sysctl.d/z-advancity-tuning.conf