Are you considering moving your Linux-based web infrastructure to an ARM dedicated server? You're not alone. System administrators, DevOps engineers, and web hosting professionals worldwide are switching from traditional x86_64 machines to ARM64 (AArch64) servers — and for good reason. ARM-powered dedicated hardware delivers significantly better performance-per-watt ratios, lower total cost of ownership, and in many benchmark scenarios, faster throughput for multi-threaded web workloads.
This comprehensive migration guide walks you through every critical step: from pre-migration planning and architecture compatibility checks to application porting, performance tuning, and post-migration validation. Whether you're running NGINX, Apache, PHP-FPM, Node.js, Python-based stacks, or containerized microservices, this tutorial gives you the hands-on knowledge to migrate confidently to an ARM dedicated server.
The shift toward ARM-based server infrastructure is not a trend; it is a fundamental restructuring of the data center landscape. Processors like the Ampere Altra, AWS Graviton3, and Neoverse N2 from Arm Holdings have proven their performance credentials at enterprise scale.
Performance Advantages of ARM Dedicated Hosting
ARM server CPUs are designed with high core counts and efficient memory bandwidth in mind. Ampere Altra, for example, offers up to 128 cores per socket with consistent single-thread performance across all cores, a significant advantage for web workloads that scale horizontally.
Higher concurrency handling: ARM dedicated servers handle more simultaneous HTTP connections with lower per-core latency
Better memory efficiency: ARM's architectural design reduces cache pressure for request-heavy workloads like PHP-FPM pools
Lower power draw: Comparable or superior performance at 30–40% less power consumption versus x86_64 equivalents
Cost Efficiency for Dedicated Server Hosting
Total cost of ownership (TCO) is one of the strongest arguments for ARM dedicated server migration. Lower power consumption translates directly to lower electricity costs and reduced cooling requirements, factors that matter enormously in colocation and dedicated hosting environments.
Ecosystem Maturity in 2025
The Linux ecosystem's ARM64 support has reached production-grade maturity. Major distributions, including Ubuntu, Debian, AlmaLinux, Rocky Linux, and Fedora, offer full AArch64 support. Docker Hub provides multi-architecture images for virtually all popular web technologies. The days of struggling with ARM compatibility are largely behind us.
Before migrating any production workload, you need to understand the key architectural differences between x86_64 and AArch64 (ARM64). These differences affect how software compiles, how operating systems schedule threads, and how memory is accessed.
Instruction Set Architecture (ISA) Differences
x86_64 uses a Complex Instruction Set Computing (CISC) design. ARM64 uses a Reduced Instruction Set Computing (RISC) design. In practical terms, this means:
Binaries compiled for x86_64 will not run natively on ARM64 without recompilation or emulation
Most interpreted languages (Python, Ruby, Node.js/JavaScript) handle this transparently through their runtimes
Compiled languages (Go, Rust, C, C++) require recompilation targeting linux/arm64
Java applications (JVM-based) run on ARM64 via OpenJDK's ARM port with no code changes
NUMA Topology and Memory Architecture on ARM Servers
Many ARM server platforms implement Non-Uniform Memory Access (NUMA)
differently from x86_64 systems. When provisioning and tuning your ARM dedicated server,
review the NUMA topology using numactl --hardware and configure your web
server worker processes accordingly.
Endianness
ARM64 operates in little-endian mode by default, consistent with x86_64. This means most Linux web software will not encounter byte-order issues during migration.
A thorough audit before touching any production system is non-negotiable. Skipping this step is the primary reason migrations fail or cause extended downtime.
Step 3.1 - Inventory All Running Services
On your current x86_64 Linux server, generate a complete service inventory:
# List all active systemd services
systemctl list-units --type=service --state=active
# List listening ports and associated processes
ss -tlnp
# List installed packages (Debian/Ubuntu)
dpkg --get-selections > installed-packages.txt
# List installed packages (RHEL/AlmaLinux/Rocky)
rpm -qa > installed-packages.txt
Save these outputs. You will reference them throughout the migration.
Step 3.2 - Identify Proprietary Binaries and x86-Only Software
The most critical compatibility check is identifying any software that ships as pre-compiled x86_64 binaries without ARM64 alternatives.
# Check ELF binary architecture for all executables in /usr/local/bin
find /usr/local/bin -type f -exec file {} \; | grep -i "ELF 64-bit"
# Check a specific binary
file /usr/bin/nginx
# Expected for x86: ELF 64-bit LSB shared object, x86-64
# Expected for ARM: ELF 64-bit LSB shared object, ARM aarch64
Common problem areas to flag during your audit:
Custom compiled modules (Apache/NGINX modules compiled from source)
Vendor-supplied monitoring agents (Datadog, New Relic, Dynatrace — all have ARM64 builds, but verify versions)
Legacy PHP extensions with compiled .so files
Electron-based CLI tools or x86-only closed-source software
Language-specific native modules (Node.js native addons, Python C extensions)
Step 3.3 - Document Configuration Files
# Archive critical configuration directories
tar -czf config-backup-$(date +%Y%m%d).tar.gz \
/etc/nginx \
/etc/apache2 \
/etc/php \
/etc/mysql \
/etc/redis \
/etc/ssl \
/etc/cron.d \
/etc/systemd/system \
/var/spool/cron
# Also capture environment variables
printenv > environment-snapshot.txt
Step 3.4 - Assess Application Dependencies
For each web application being migrated, document:
| Dependency | Current Version | ARM64 Support | Action Required |
|---|---|---|---|
| PHP | 8.2.x | Full | Reinstall from repo |
| Node.js | 20.x LTS | Full | Reinstall via nvm |
| Python | 3.11.x | Full | Reinstall from repo |
| MySQL | 8.0.x | Full | Migrate data |
| Redis | 7.x | Full | Reinstall, restore RDB |
| Custom NGINX module | x86 build | Unknown | Recompile from source |
Not all ARM dedicated servers are built for the same use cases. Selecting the wrong configuration is a common and expensive mistake.
ARM Server CPU Families to Know
Ampere Altra / Altra Max: The Ampere Altra family is the leading choice for cloud-native and web hosting workloads. With up to 128 cores, predictable single-thread performance, and exceptional memory bandwidth, Altra-based dedicated servers excel at high-concurrency web serving, API gateways, and containerized application hosting.
Arm Neoverse N2 / N1: Neoverse-based processors power a wide range of server platforms from vendors like Marvell (ThunderX3) and Fujitsu. These platforms offer strong multi-threaded performance and broad Linux distribution support.
AWS Graviton (Reference Architecture): While Graviton processors are typically cloud-only, understanding their performance profile helps benchmark your expectations for bare-metal ARM dedicated server performance in colocation environments.
Sizing Your ARM Dedicated Server
For web workload migration, a common sizing approach:
Light web hosting (shared-style): 16–32 ARM64 cores, 64 GB RAM, NVMe SSD storage
Medium application servers: 64 ARM64 cores, 128–256 GB RAM, NVMe RAID storage
High-traffic platforms: 128 ARM64 cores, 512 GB RAM, 10Gbps network uplink
At COLO BIRD, our ARM dedicated server configurations are purpose-built for Linux web workloads with NVMe storage, redundant network uplinks, and full root access — giving you the control you need for a smooth migration.
Storage and Network Considerations
ARM dedicated servers support the same NVMe, SATA SSD, and HDD storage options as x86_64 platforms. For web hosting migrations, prioritize:
NVMe SSD storage for database and application data (low-latency I/O is critical)
10Gbps or 25Gbps network for high-traffic web properties
IPMI/iDRAC remote access for out-of-band management during migration
With your ARM dedicated server provisioned, the first task is establishing a solid, production-ready Linux base.
| Distribution | ARM64 Support | Best For |
|---|---|---|
| Ubuntu 22.04 LTS (Jammy) | Excellent | LAMP/LEMP stacks, Docker, Kubernetes |
| Ubuntu 24.04 LTS (Noble) | Excellent | Latest software, newer kernels |
| Debian 12 (Bookworm) | Excellent | Stability-first environments |
| AlmaLinux 9 | Excellent | RHEL-compatible enterprise stacks |
| Rocky Linux 9 | Excellent | RHEL-compatible enterprise stacks |
| Fedora Server 40 | Good | Cutting-edge kernel features |
For most Linux web hosting migrations, Ubuntu 22.04 LTS or Debian 12 provide the best balance of package availability, community support, and ARM64 optimization.
Initial ARM Server Configuration
# Verify ARM64 architecture
uname -m
# Output should be: aarch64
# Update package repositories and upgrade
apt update && apt upgrade -y # Debian/Ubuntu
dnf update -y # RHEL/AlmaLinux/Rocky
# Install essential tooling
apt install -y \
build-essential \
git \
curl \
wget \
htop \
iotop \
net-tools \
lsof \
tcpdump \
nftables \
fail2ban \
unzip \
rsync \
screen \
vim
# Verify CPU architecture details
lscpu | grep -E "Architecture|CPU\(s\)|Thread|Socket|NUMA"
Kernel Tuning for Web Workloads on ARM
ARM64 Linux kernels support the same sysctl tuning parameters as x86_64. Apply these optimizations for high-traffic web servers:
# /etc/sysctl.d/99-webserver-arm.conf
# Network stack optimizations
net.core.somaxconn = 65535
net.core.netdev_max_backlog = 65535
net.ipv4.tcp_max_syn_backlog = 65535
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 15
# Memory management
vm.swappiness = 10
vm.dirty_ratio = 15
vm.dirty_background_ratio = 5
# File descriptor limits
fs.file-max = 2000000
# Apply immediately
sysctl -p /etc/sysctl.d/99-webserver-arm.conf
Web server software, NGINX, Apache HTTP Server, and Caddy, all have first-class ARM64 support and can be installed from standard distribution repositories without any special steps.
Migrating NGINX to ARM64
NGINX compiles and performs exceptionally well on ARM64. The migration process focuses on configuration portability rather than binary compatibility.
Install NGINX on your ARM dedicated server:
# Ubuntu/Debian
apt install -y nginx
# RHEL/AlmaLinux/Rocky (using official NGINX repo for latest version)
cat > /etc/yum.repos.d/nginx.repo << 'EOF'
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
EOF
dnf install -y nginx
Transfer your NGINX configuration:
# From your x86_64 server, copy all configuration files
rsync -avz --progress \
/etc/nginx/ \
root@your-arm-server:/etc/nginx/
# Test configuration on the ARM server before starting
nginx -t
# If test passes, enable and start
systemctl enable --now nginx
Important: If you use any custom NGINX modules compiled from source (such as ngx_brotli, nginx-auth-ldap, or custom upstream modules), you must recompile them on your ARM64 server:
# Example: Recompiling nginx with brotli module on ARM64
apt install -y libgd-dev libssl-dev libpcre3-dev zlib1g-dev
git clone --recurse-submodules https://github.com/google/ngx_brotli
wget http://nginx.org/download/nginx-$(nginx -v 2>&1 | grep -o '[0-9.]*').tar.gz
tar xzf nginx-*.tar.gz && cd nginx-*/
./configure --with-compat --add-dynamic-module=../ngx_brotli
make modules
cp objs/ngx_http_brotli_filter_module.so /etc/nginx/modules/
Migrating Apache HTTP Server to ARM64
Apache HTTP Server is fully supported on ARM64 across all major Linux distributions:
# Ubuntu/Debian
apt install -y apache2
# RHEL/AlmaLinux/Rocky
dnf install -y httpd
# Transfer virtual host configurations
rsync -avz /etc/apache2/sites-available/ root@arm-server:/etc/apache2/sites-available/
rsync -avz /etc/apache2/conf-available/ root@arm-server:/etc/apache2/conf-available/
# Enable modules (module state is not portable — must re-enable on ARM)
a2enmod rewrite headers ssl deflate expires proxy proxy_fcgi
# Enable your virtual hosts
for site in /etc/apache2/sites-available/*.conf; do
a2ensite "$(basename "$site" .conf)"
done
# Test and start
apache2ctl configtest && systemctl enable --now apache2
Application runtime migration is where most developers encounter the steepest learning curve. The good news: all major scripting and interpreted languages offer full ARM64 support in 2025.
PHP Migration to ARM64
PHP on ARM64 delivers competitive performance. PHP-FPM (FastCGI Process Manager) is the recommended configuration for both NGINX and Apache on ARM dedicated servers.
# Ubuntu 22.04/24.04 — Install PHP 8.2 with common extensions
apt install -y software-properties-common
add-apt-repository ppa:ondrej/php
apt update
apt install -y \
php8.2 \
php8.2-fpm \
php8.2-cli \
php8.2-mysql \
php8.2-pgsql \
php8.2-redis \
php8.2-curl \
php8.2-gd \
php8.2-mbstring \
php8.2-xml \
php8.2-zip \
php8.2-intl \
php8.2-bcmath \
php8.2-opcache
Transfer PHP-FPM pool configurations:
rsync -avz /etc/php/8.2/fpm/pool.d/ root@arm-server:/etc/php/8.2/fpm/pool.d/
rsync -avz /etc/php/8.2/fpm/php-fpm.conf root@arm-server:/etc/php/8.2/fpm/php-fpm.conf
rsync -avz /etc/php/8.2/fpm/php.ini root@arm-server:/etc/php/8.2/fpm/php.ini
systemctl enable --now php8.2-fpm
PHP Opcache Tuning for ARM:
; /etc/php/8.2/fpm/conf.d/10-opcache.ini
opcache.enable=1
opcache.memory_consumption=256
opcache.interned_strings_buffer=16
opcache.max_accelerated_files=20000
opcache.validate_timestamps=0
opcache.revalidate_freq=0
opcache.fast_shutdown=1
opcache.jit_buffer_size=100M
opcache.jit=tracing
Node.js Migration to ARM64
Node.js maintains official ARM64 binaries. The recommended installation method is nvm (Node Version Manager):
# Install nvm on the ARM server
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
source ~/.bashrc
# Install your required Node.js version (ARM64 binary is auto-selected)
nvm install 20
nvm use 20
node --version # Verify
node -e "console.log(process.arch)" # Should output: arm64
# Reinstall your application dependencies
cd /var/www/your-app
npm ci --production
Native addons and Node.js on ARM64: If your Node.js application uses native addons (compiled .node files), they must be rebuilt on the ARM server:
npm rebuild
# Or for specific packages:
npm install --build-from-source
Python Migration to ARM64
Python is interpreted and handles architecture differences through its runtime. Python 3.x is fully supported on AArch64:
# Install Python 3.11 on Ubuntu/Debian
apt install -y python3.11 python3.11-venv python3.11-dev python3-pip
# Recreate your virtual environments (do NOT copy venvs from x86 — rebuild them)
python3.11 -m venv /var/www/your-app/venv
source /var/www/your-app/venv/bin/activate
# Reinstall dependencies (pip will pull ARM64-compatible wheels)
pip install -r requirements.txt
Warning: Never copy Python virtual environments (venv directories) from x86_64 to ARM64. They contain compiled C extensions and will fail. Always recreate venvs and reinstall packages on the ARM server.
Database migration requires the most careful planning. For high-availability production environments, a logical migration approach (dump and restore) is safer than physical data file copying, especially across architectures.
MySQL / MariaDB Migration to ARM64
# On the SOURCE x86_64 server — create a full logical backup
mysqldump \
--all-databases \
--single-transaction \
--master-data=2 \
--flush-logs \
--routines \
--triggers \
--events \
-u root -p \
| gzip > /backup/full-mysql-dump-$(date +%Y%m%d).sql.gz
# Transfer to ARM server
rsync -avz --progress \
/backup/full-mysql-dump-*.sql.gz \
root@arm-server:/backup/
# On the ARM server — install MySQL and restore
apt install -y mysql-server
# Restore the dump
gunzip < /backup/full-mysql-dump-*.sql.gz | mysql -u root -p
# Transfer MySQL configuration
rsync -avz /etc/mysql/mysql.conf.d/ root@arm-server:/etc/mysql/mysql.conf.d/
systemctl restart mysql
PostgreSQL Migration to ARM64
# On SOURCE server — create compressed dump
pg_dumpall -U postgres | gzip > /backup/postgres-full-$(date +%Y%m%d).sql.gz
# On ARM server — install matching PostgreSQL version
apt install -y postgresql postgresql-contrib
# Restore
gunzip < /backup/postgres-full-*.sql.gz | psql -U postgres
# Copy configuration files
rsync -avz /etc/postgresql/15/main/postgresql.conf \
root@arm-server:/etc/postgresql/15/main/postgresql.conf
rsync -avz /etc/postgresql/15/main/pg_hba.conf \
root@arm-server:/etc/postgresql/15/main/pg_hba.conf
systemctl restart postgresql
Redis Migration to ARM64
Redis migration is straightforward because its RDB and AOF persistence files are architecture-independent:
# On SOURCE server — trigger a BGSAVE for a clean RDB snapshot
redis-cli BGSAVE
# Wait for background save to complete
redis-cli LASTSAVE
# Copy the RDB file
rsync -avz /var/lib/redis/dump.rdb root@arm-server:/var/lib/redis/dump.rdb
# On ARM server
apt install -y redis-server
# Copy Redis configuration
rsync -avz /etc/redis/redis.conf root@arm-server:/etc/redis/redis.conf
# Set correct permissions and start
chown redis:redis /var/lib/redis/dump.rdb
systemctl enable --now redis-server
# Verify data loaded correctly
redis-cli DBSIZE
If your web infrastructure is containerized, migrating to an ARM dedicated server is significantly simpler, but you still need to handle multi-architecture image compatibility.
Docker on ARM64
# Install Docker on ARM64 (same command, Docker auto-selects ARM64 runtime)
curl -fsSL https://get.docker.com | sh
systemctl enable --now docker
# Verify Docker is running on ARM64
docker info | grep "Architecture"
docker run --rm alpine uname -m # Should output: aarch64
Multi-Architecture Container Images
The Docker Hub ecosystem provides multi-architecture manifests for most
official images. When you pull nginx:latest, mysql:8.0, or
node:20 on an ARM64 host, Docker automatically selects the ARM64 image
layer.
# Verify image architecture before pulling
docker manifest inspect nginx:latest | grep architecture
# If you have custom x86-only images, rebuild them on ARM:
docker buildx build --platform linux/arm64 -t your-registry/your-app:arm64 .
Handling x86-Only Containers on ARM
Some legacy or proprietary containers may not have ARM64 builds. Your options are:
Rebuild the container from source on ARM64 (preferred)
Use QEMU emulation via
docker run --platform linux/amd64 (functional but
slower, not for production)
Contact the vendor for ARM64 support or an alternative
Kubernetes on ARM64
Kubernetes supports ARM64 worker and control-plane nodes. If you're running a self-managed Kubernetes cluster on ARM dedicated servers:
# Install kubeadm, kubelet, kubectl (ARM64 packages are auto-selected by apt/dnf)
apt install -y kubeadm kubelet kubectl
# When initializing a cluster, explicitly specify the pod network CIDR
kubeadm init --pod-network-cidr=10.244.0.0/16
# Apply Flannel (ARM64-supported CNI plugin)
kubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml
SSL certificates and private keys are architecture-independent; they transfer directly without modification.
Transferring Let's Encrypt Certificates
# Option 1: Sync the entire Certbot directory
rsync -avz /etc/letsencrypt/ root@arm-server:/etc/letsencrypt/
rsync -avz /var/lib/letsencrypt/ root@arm-server:/var/lib/letsencrypt/
# Install Certbot on ARM server
apt install -y certbot python3-certbot-nginx # or certbot-apache
# Update renewal configurations to match new server paths
# No renewal needed immediately — certificates are still valid
Transferring Custom SSL Certificates
rsync -avz /etc/ssl/private/ root@arm-server:/etc/ssl/private/
rsync -avz /etc/ssl/certs/ root@arm-server:/etc/ssl/certs/
# Set correct permissions on the ARM server
chmod 700 /etc/ssl/private
chmod 600 /etc/ssl/private/*.key
Firewall and Security Configuration
# UFW (Ubuntu/Debian)
rsync -avz /etc/ufw/ root@arm-server:/etc/ufw/
ufw enable
# nftables
rsync -avz /etc/nftables.conf root@arm-server:/etc/nftables.conf
systemctl enable --now nftables
# Fail2ban
rsync -avz /etc/fail2ban/ root@arm-server:/etc/fail2ban/
systemctl enable --now fail2ban
The DNS cutover is the moment of truth. A well-planned cutover strategy allows you to migrate with zero or near-zero downtime.
Phase 1 - Parallel Operation (1–2 weeks before cutover)
Keep your x86_64 server fully operational
Complete all software installation and configuration on the ARM server
Sync web application files to the ARM server
Run both servers in parallel, the ARM server serving test/staging traffic
Phase 2 - Data Synchronization
# Set up continuous rsync for web files (run every 5 minutes via cron)
rsync -az --delete \
/var/www/ \
root@arm-server:/var/www/
# For databases, set up replication (MySQL example)
# On x86 source server — create a replication user
mysql -u root -p -e "
CREATE USER 'repl'@'arm-server-ip' IDENTIFIED BY 'strong_password';
GRANT REPLICATION SLAVE ON *.* TO 'repl'@'arm-server-ip';
FLUSH PRIVILEGES;"
# On ARM replica — configure replication
mysql -u root -p -e "
CHANGE MASTER TO
MASTER_HOST='x86-server-ip',
MASTER_USER='repl',
MASTER_PASSWORD='strong_password',
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=12345;
START SLAVE;"
Phase 3 - Pre-Cutover Validation
Before touching DNS, run a full validation of the ARM server:
# Test web server response
curl -I http://arm-server-ip
curl -k https://arm-server-ip
# Test application endpoints via Host header override
curl -H "Host: yourdomain.com" http://arm-server-ip/health
# Test database connectivity from the application
# Run your application's built-in health checks
Phase 4 - DNS Cutover
# Lower TTL 24–48 hours before cutover (to 60–300 seconds)
# This allows faster propagation if you need to roll back
# After validation passes, update your A record:
# yourdomain.com A [ARM server IP]
# Monitor DNS propagation
watch -n 5 "dig +short yourdomain.com @8.8.8.8"
Phase 5 - Post-Cutover Monitoring (Keep x86 server available for 48 hours)
Keep your old x86_64 server online for at least 48 hours after DNS cutover. This allows rapid rollback if unexpected issues surface in production.
After completing your Linux web workload migration to the ARM dedicated server, establish performance baselines and validate the migration delivered the expected improvements.
Web Server Benchmarking with wrk
# Install wrk on the ARM server
apt install -y wrk
# Benchmark NGINX static file serving
wrk -t12 -c400 -d30s http://localhost/
# Benchmark PHP application endpoint
wrk -t12 -c400 -d30s http://localhost/api/health
# Benchmark with custom Lua script for POST requests
wrk -t4 -c100 -d30s -s post.lua http://localhost/api/endpoint
System-Level Performance Monitoring
# CPU utilization breakdown (per-core on ARM)
mpstat -P ALL 1 10
# Memory and I/O stats
vmstat 1 20
# NGINX real-time connection stats (requires stub_status module)
curl http://localhost/nginx_status
# PHP-FPM pool stats
curl http://localhost/fpm-status?full
# Monitor ARM-specific performance counters
perf stat -a sleep 10
Database Query Performance Validation
# MySQL: Run EXPLAIN on your top queries and compare execution plans
mysql -u root -p -e "EXPLAIN SELECT * FROM your_table WHERE indexed_col = 'value';"
# Check for any query performance regressions
mysqlslap --auto-generate-sql --concurrency=50 --iterations=10 -u root -p
# PostgreSQL: pg_stat_statements extension
psql -U postgres -c "SELECT query, calls, mean_exec_time FROM pg_stat_statements ORDER BY mean_exec_time DESC LIMIT 20;"
Even well-planned migrations encounter unexpected issues. Here are the most common ARM64 migration problems and their solutions.
Issue: Illegal Instruction (SIGILL) Errors
Symptom: An application crashes immediately with "Illegal
instruction" or a core dump.
Cause: A pre-compiled binary or shared library targeting x86-specific
CPU instructions (AVX, SSE4) is being executed on ARM64.
Solution:
# Identify the problematic binary
dmesg | tail -20 # Look for SIGILL entries
# Rebuild the software from source, targeting ARM64
./configure --host=aarch64-linux-gnu
make -j$(nproc)
make install
Issue: Missing ARM64 Package in Repository
Symptom: apt install some-package fails with
"Package not found" on ARM64.
Solution options:
Search for an ARM64 alternative package name
Build from source (most open-source software supports ARM64)
Use the Snap Store or Flatpak (many ARM64 builds available)
Use Docker with an ARM64 container image
Issue: Node.js Native Addon Build Failures
Symptom: npm install fails with compilation
errors on ARM64.
# Install build essentials
apt install -y build-essential python3 make g++
# Clear npm cache and rebuild
npm cache clean --force
npm install --build-from-source
# For specific packages requiring Python 2 (legacy)
apt install -y python2
npm config set python python2
Issue: PHP Extension Not Available for ARM64
# Check available PHP extensions for ARM64
apt-cache search php8.2 | grep arm
# Build extension from source using PECL
apt install -y php8.2-dev
pecl install extension_name
Issue: MySQL InnoDB Buffer Pool Warnings After Migration
After a logical dump-and-restore migration, MySQL's InnoDB buffer pool needs time to warm up. You may see slow queries for the first few hours:
# Pre-warm the InnoDB buffer pool
mysql -u root -p -e "
SELECT count(*) FROM information_schema.INNODB_BUFFER_PAGE;"
# Or use pt-query-digest to identify and pre-warm specific tables
Issue: Redis AOF Rewrite Failing on ARM
If Redis AOF (Append-Only File) rewrite fails after migration, it's typically a permissions issue:
chown -R redis:redis /var/lib/redis
chmod 750 /var/lib/redis
systemctl restart redis-server
redis-cli BGREWRITEAOF
Migrating to an ARM dedicated server is not a one-time event, it's the beginning of a new infrastructure lifecycle. Building good maintenance habits from day one ensures your ARM web server remains secure, performant, and cost-efficient over the long term.
Automated Security Patching
# Ubuntu/Debian — Enable unattended security upgrades
apt install -y unattended-upgrades
dpkg-reconfigure --priority=low unattended-upgrades
# Verify ARM64 packages are included in auto-update scope
cat /etc/apt/apt.conf.d/50unattended-upgrades
Monitoring ARM-Specific Metrics
Set up continuous monitoring for ARM-specific health indicators:
CPU temperature (ARM servers in dense colocation environments can run hot)
NUMA node memory balance (unbalanced NUMA allocation degrades performance)
Per-core CPU steal time (relevant if ARM server is a VM, less so for bare metal)
Memory bandwidth utilization (ARM servers are often memory-bandwidth-sensitive)
Recommended monitoring stack for ARM Linux web servers: Prometheus + Node Exporter + Grafana. All three have native ARM64 builds and run with no x86-specific dependencies.
ARM Software Update Considerations
When upstream software releases new versions, ARM64 binaries may lag x86_64 by hours to days. Always verify ARM64 binary availability before scheduling production upgrades:
# Check available ARM64 versions before upgrading
apt-cache policy nginx php8.2-fpm mysql-server
# For manually maintained software, check GitHub releases for arm64/aarch64 assets
Periodic Performance Reviews
Schedule quarterly performance reviews that include:
Re-running your wrk benchmarks against baseline numbers
Reviewing NGINX/Apache access logs for slow request trends
Auditing PHP-FPM pool utilization and adjusting worker counts
Reviewing MySQL/PostgreSQL slow query logs
Checking disk I/O saturation as your database grows
Migrating Linux web workloads to an ARM dedicated server is no longer an experimental endeavor. With mature Linux distribution support, full ARM64 compatibility across the entire web stack (NGINX, Apache, PHP, Python, Node.js, MySQL, PostgreSQL, Docker), and significant performance and cost advantages, ARM dedicated servers are a compelling production-grade infrastructure choice for 2025 and beyond.
The migration process, while thorough, is systematic and achievable with the planning steps outlined in this guide. The investment in migration pays dividends through lower hosting costs, better hardware utilization, and a more scalable infrastructure foundation.
At COLO BIRD, we specialize in ARM dedicated server hosting designed specifically for Linux web workloads. Our ARM bare-metal configurations offer full root access, NVMe SSD storage, and high-bandwidth network uplinks, everything you need to run a successful ARM migration and keep your web infrastructure performing at its peak.
WordPress is a PHP-based application and runs natively on ARM64 without any modifications. MySQL/MariaDB, PHP-FPM, and NGINX or Apache all have full ARM64 support. WordPress performance on ARM dedicated hardware is generally comparable to and in high-concurrency scenarios, better than equivalent x86_64 hardware.
cPanel does not currently support ARM64. Plesk has limited ARM64 support. For ARM dedicated servers, self-managed stacks (LEMP, LAMP) or panel alternatives like HestiaCP (which supports ARM64) are the recommended approach.
A straightforward LEMP stack migration can be completed in 4–8 hours for an experienced administrator. Complex migrations involving many custom applications, compiled modules, or large databases may require 2–5 days of parallel operation before the final DNS cutover.
For most web workloads — especially those that are multi-threaded and memory-bandwidth-intensive — ARM dedicated servers deliver equivalent or better performance than x86_64 servers in the same price category. PHP applications, Python API servers, and Node.js services all show strong ARM64 benchmark results.
PHP, Python, Ruby, and JavaScript (Node.js) code runs as-is on ARM64. Go and Rust applications need to be recompiled for GOARCH=arm64 / --target aarch64-unknown-linux-gnu. C/C++ applications need recompilation. Java applications run through OpenJDK's ARM64 JVM without code changes.