How to Allocate Server Resources Efficiently

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  1. How to Allocate Server Resources Efficiently

This article provides a guide for efficiently allocating server resources to a MediaWiki 1.40 installation. Proper resource allocation is critical for ensuring optimal performance, stability, and scalability. This tutorial is geared towards system administrators and server engineers responsible for maintaining a MediaWiki site.

Understanding Resource Requirements

MediaWiki's resource demands vary significantly based on several factors, including traffic volume, wiki size (number of pages), complexity of pages (use of templates, extensions), and the number of concurrent users. Ignoring these factors can lead to slow page loads, database bottlenecks, and even server crashes. Key resources to consider are CPU, RAM, storage (disk I/O), and network bandwidth. It's also vital to understand the role of the PHP interpreter, the web server (Apache or Nginx), and the database server (typically MySQL/MariaDB).

CPU Allocation

The CPU handles the processing of PHP scripts, database queries, and other server-side tasks. The number of CPU cores needed depends heavily on the expected load.

CPU Core Recommendations Wiki Size Concurrent Users (Approximate)
1-2 Cores Small (under 10,000 pages) Low (under 50)
4-8 Cores Medium (10,000 - 100,000 pages) Moderate (50 - 200)
8+ Cores Large (over 100,000 pages) High (over 200)

Consider using a CPU monitoring tool like `top` or `htop` to observe CPU usage during peak times. If CPU usage consistently exceeds 80%, consider upgrading to a more powerful CPU or scaling horizontally (adding more servers). Don't forget to tune your PHP configuration for optimal performance.

RAM Allocation

RAM is crucial for caching frequently accessed data, reducing disk I/O, and improving overall performance. Insufficient RAM can lead to excessive swapping, which significantly slows down the server.

RAM Recommendations Wiki Size Concurrent Users (Approximate) PHP Memory Limit
2GB - 4GB Small (under 10,000 pages) Low (under 50) 128MB - 256MB
4GB - 8GB Medium (10,000 - 100,000 pages) Moderate (50 - 200) 256MB - 512MB
8GB+ Large (over 100,000 pages) High (over 200) 512MB+

The PHP memory limit should be set appropriately based on the complexity of your wiki and the extensions you are using. Monitor RAM usage using tools like `free` or `vmstat`. Ensure you have enough RAM for the database server as well.

Storage and Disk I/O

MediaWiki stores its data in a database (typically MySQL/MariaDB) and also requires storage for images, files, and backups. Disk I/O performance is critical, especially for database operations.

Storage Type Performance Cost Suitability for MediaWiki
HDD (Hard Disk Drive) Low Low Suitable for backups and infrequently accessed files. Not recommended for the database.
SSD (Solid State Drive) High Moderate Recommended for the database and frequently accessed files. Significantly improves performance.
NVMe SSD Very High High Best performance, ideal for very large wikis with high traffic.

Consider using RAID configurations for redundancy and improved performance. Regularly monitor disk I/O using tools like `iostat`. Regularly database maintenance tasks are essential. Ensure sufficient disk space for future growth and backups. Consider using a separate partition for `/var/lib/mysql` (or equivalent) to isolate database data.

Network Bandwidth

Sufficient network bandwidth is essential for delivering pages to users quickly. The required bandwidth depends on the number of users and the average page size.

  • **Low Traffic Wiki:** 10 Mbps
  • **Moderate Traffic Wiki:** 100 Mbps
  • **High Traffic Wiki:** 1 Gbps or more

Monitor network traffic using tools like `iftop` or `nload`. Consider using a Content Delivery Network (CDN) to cache static content and reduce the load on your server.

Database Server Configuration

The database server is often the biggest bottleneck in a MediaWiki installation. Properly configuring the database server is crucial for optimal performance. Key settings to tune include:

  • `innodb_buffer_pool_size`: Allocate a significant portion of RAM to this setting (typically 50-80% of available RAM).
  • `query_cache_size`: Enable and configure the query cache to cache frequently executed queries.
  • `max_connections`: Increase the maximum number of connections to handle concurrent users.
  • `key_buffer_size`: (For MyISAM tables, though InnoDB is preferred) Optimize for key caching.

Refer to the MySQL/MariaDB documentation for detailed information on these settings.

Monitoring and Optimization

Regularly monitor your server's performance using tools like `top`, `htop`, `free`, `vmstat`, `iostat`, and `iftop`. Analyze the data to identify bottlenecks and optimize your configuration accordingly. Consider using a dedicated monitoring solution like Nagios, Zabbix, or Prometheus. Regularly check MediaWiki's performance troubleshooting guide.



Special:MyPage Help:Contents MediaWiki FAQ Configuration settings Manual:Configuration form Manual:Upgrading Manual:Installing Extension:Semantic MediaWiki Help:Images Help:Links Help:Tables Help:Formatting Manual:Database setup Manual:Command-line tools Manual:API Manual:Admin Manual:Developer


Intel-Based Server Configurations

Configuration Specifications Benchmark
Core i7-6700K/7700 Server 64 GB DDR4, NVMe SSD 2 x 512 GB CPU Benchmark: 8046
Core i7-8700 Server 64 GB DDR4, NVMe SSD 2x1 TB CPU Benchmark: 13124
Core i9-9900K Server 128 GB DDR4, NVMe SSD 2 x 1 TB CPU Benchmark: 49969
Core i9-13900 Server (64GB) 64 GB RAM, 2x2 TB NVMe SSD
Core i9-13900 Server (128GB) 128 GB RAM, 2x2 TB NVMe SSD
Core i5-13500 Server (64GB) 64 GB RAM, 2x500 GB NVMe SSD
Core i5-13500 Server (128GB) 128 GB RAM, 2x500 GB NVMe SSD
Core i5-13500 Workstation 64 GB DDR5 RAM, 2 NVMe SSD, NVIDIA RTX 4000

AMD-Based Server Configurations

Configuration Specifications Benchmark
Ryzen 5 3600 Server 64 GB RAM, 2x480 GB NVMe CPU Benchmark: 17849
Ryzen 7 7700 Server 64 GB DDR5 RAM, 2x1 TB NVMe CPU Benchmark: 35224
Ryzen 9 5950X Server 128 GB RAM, 2x4 TB NVMe CPU Benchmark: 46045
Ryzen 9 7950X Server 128 GB DDR5 ECC, 2x2 TB NVMe CPU Benchmark: 63561
EPYC 7502P Server (128GB/1TB) 128 GB RAM, 1 TB NVMe CPU Benchmark: 48021
EPYC 7502P Server (128GB/2TB) 128 GB RAM, 2 TB NVMe CPU Benchmark: 48021
EPYC 7502P Server (128GB/4TB) 128 GB RAM, 2x2 TB NVMe CPU Benchmark: 48021
EPYC 7502P Server (256GB/1TB) 256 GB RAM, 1 TB NVMe CPU Benchmark: 48021
EPYC 7502P Server (256GB/4TB) 256 GB RAM, 2x2 TB NVMe CPU Benchmark: 48021
EPYC 9454P Server 256 GB RAM, 2x2 TB NVMe

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⚠️ *Note: All benchmark scores are approximate and may vary based on configuration. Server availability subject to stock.* ⚠️

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