System Buffer Tuning - TCP and Network Performance Optimization

Legacy Linux کی ترتیبات (Circa 2009)

موجودہ لینکس کی ترتیبات (2025-2026)

لینکس کنفیگریشن ایپلی کیشن

ان ترتیبات کو شامل کریں۔/etc/sysctl.confیا ایک نئی فائل بنائیں/etc/sysctl.d/99-network-tuning.conf:

# Network Buffer Tuning for High-Performance Applications
# Optimized for 10GbE+ networks with RTT up to 300ms

# Core socket buffer settings
net.core.rmem_default = 16777216
net.core.rmem_max = 134217728
net.core.wmem_default = 16777216
net.core.wmem_max = 134217728

# TCP buffer settings
net.ipv4.tcp_rmem = 4096 87380 134217728
net.ipv4.tcp_wmem = 4096 65536 134217728
net.ipv4.tcp_mem = 8388608 12582912 16777216

# Device buffer settings
net.core.netdev_max_backlog = 250000
net.core.netdev_budget = 50000
net.core.netdev_budget_usecs = 5000
net.core.optmem_max = 65536

# TCP optimizations
net.ipv4.tcp_congestion_control = bbr
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1

# Apply with: sysctl -p /etc/sysctl.d/99-network-tuning.conf

این آئی سی رنگ بفر ٹیوننگ

# Check current ring buffer sizes
ethtool -g eth0

# Set maximum ring buffer sizes (adjust based on NIC capabilities)
ethtool -G eth0 rx 4096 tx 4096

# Make persistent by adding to /etc/network/interfaces or systemd service

لیگیسی ونڈوز سیٹنگز (سرکا 2009 - ونڈوز وسٹا/7/سرور 2008)

موجودہ ونڈوز سیٹنگز (ونڈوز 10/11/سرور 2019-2025)

جدید ونڈوز استعمال کرتا ہے۔ونڈو آٹو ٹیوننگ وصول کریں۔فیچر، جو متحرک طور پر نیٹ ورک کے حالات کی بنیاد پر وصول کرنے والے بفر کو ایڈجسٹ کرتا ہے۔

ونڈوز کنفیگریشن کمانڈز

# Check current auto-tuning level
netsh interface tcp show global

# Enable auto-tuning (normal mode - default for most scenarios)
netsh interface tcp set global autotuninglevel=normal

# For high-bandwidth, high-latency networks (10GbE+, data center environments)
netsh interface tcp set global autotuninglevel=experimental

# For conservative tuning (if experimental causes issues)
netsh interface tcp set global autotuninglevel=restricted

# For very conservative tuning (not recommended for high-performance networks)
netsh interface tcp set global autotuninglevel=highlyrestricted

# Enable CUBIC congestion provider (Windows Server 2022/Windows 11+ only)
netsh interface tcp set supplemental template=Internet congestionprovider=cubic

# Note: Windows 10 and Server 2019 use Compound TCP or NewReno by default
# CUBIC is not available on these older versions

# Enable Receive-Side Scaling (RSS)
netsh interface tcp set global rss=enabled

# Set chimney offload (automatic is recommended)
netsh interface tcp set global chimney=automatic

# Disable NetDMA (recommended for modern systems)
netsh interface tcp set global netdma=disabled

# Enable Direct Cache Access (if supported)
netsh interface tcp set global dca=enabled

# Enable ECN (Explicit Congestion Notification)
netsh interface tcp set global ecncapability=enabled

# Set initial congestion window to 10 (RFC 6928)
netsh interface tcp set global initialRto=3000

اعلی درجے کی NIC بفر سیٹنگز (بذریعہ ڈیوائس مینیجر یا پاور شیل)

# View current adapter settings
Get-NetAdapterAdvancedProperty -Name "Ethernet"

# Increase receive buffers (adjust based on NIC)
Set-NetAdapterAdvancedProperty -Name "Ethernet" -DisplayName "Receive Buffers" -DisplayValue 2048

# Increase transmit buffers
Set-NetAdapterAdvancedProperty -Name "Ethernet" -DisplayName "Transmit Buffers" -DisplayValue 2048

# Enable Jumbo Frames (if network supports it)
Set-NetAdapterAdvancedProperty -Name "Ethernet" -DisplayName "Jumbo Packet" -DisplayValue 9014

# Enable Large Send Offload (LSO)
Set-NetAdapterAdvancedProperty -Name "Ethernet" -DisplayName "Large Send Offload V2 (IPv4)" -DisplayValue Enabled
Set-NetAdapterAdvancedProperty -Name "Ethernet" -DisplayName "Large Send Offload V2 (IPv6)" -DisplayValue Enabled

رجسٹری ٹویکس (اعلی درجے کی - احتیاط کے ساتھ استعمال کریں)

# These settings are typically NOT needed on Windows 10/11 due to auto-tuning
# Only modify if auto-tuning is disabled or problematic

# Registry path: HKLM\System\CurrentControlSet\Services\Tcpip\Parameters

# Maximum TCP window size (if auto-tuning disabled)
# TcpWindowSize = 16777216 (16MB) - REG_DWORD

# Enable window scaling (enabled by default on modern Windows)
# Tcp1323Opts = 3 - REG_DWORD

# Number of TCP Timed Wait Delay
# TcpTimedWaitDelay = 30 - REG_DWORD (default 240)

Legacy macOS کی ترتیبات (Circa 2009 - Mac OS X 10.5/10.6)

موجودہ macOS ترتیبات (macOS 12-15 Monterey بذریعہ Sequoia)

macOS کنفیگریشن ایپلی کیشن

# Check current settings
sysctl kern.ipc.maxsockbuf
sysctl net.inet.tcp.sendspace
sysctl net.inet.tcp.recvspace
sysctl net.inet.tcp.autorcvbufmax
sysctl net.inet.tcp.autosndbufmax

# Apply settings temporarily (until reboot)
sudo sysctl -w kern.ipc.maxsockbuf=8388608
sudo sysctl -w net.inet.tcp.sendspace=131072
sudo sysctl -w net.inet.tcp.recvspace=131072
sudo sysctl -w net.inet.tcp.autorcvbufmax=16777216
sudo sysctl -w net.inet.tcp.autosndbufmax=16777216
sudo sysctl -w net.inet.tcp.rfc1323=1
sudo sysctl -w net.inet.tcp.sack=1

# Make settings persistent (create /etc/sysctl.conf)
sudo tee /etc/sysctl.conf <<EOF
kern.ipc.maxsockbuf=8388608
net.inet.tcp.sendspace=131072
net.inet.tcp.recvspace=131072
net.inet.tcp.autorcvbufmax=16777216
net.inet.tcp.autosndbufmax=16777216
net.inet.tcp.rfc1323=1
net.inet.tcp.sack=1
net.inet.tcp.mssdflt=1440
net.inet.tcp.delayed_ack=3
EOF

# Note: On recent macOS versions, /etc/sysctl.conf may not be read automatically
# Use a LaunchDaemon to apply settings at boot

مستقل ترتیبات کے لئے لانچ ڈیمون بنانا

# Create /Library/LaunchDaemons/com.local.sysctl.plist
sudo tee /Library/LaunchDaemons/com.local.sysctl.plist <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>com.local.sysctl</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/sbin/sysctl</string>
        <string>-w</string>
        <string>kern.ipc.maxsockbuf=8388608</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>
EOF

sudo chmod 644 /Library/LaunchDaemons/com.local.sysctl.plist
sudo launchctl load /Library/LaunchDaemons/com.local.sysctl.plist