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=== Maximizing Browser Farming Efficiency with 64 GB DDR4 RAM ===

This article details optimizing a MediaWiki server for “browser farming” – a technique used for automated content generation and testing – using 64 GB of DDR4 RAM. Browser farming places a significant load on server resources; adequate RAM is critical for performance and stability. This guide assumes a basic understanding of [[Server administration]] and [[MediaWiki installation]].

== Understanding Browser Farming and Resource Needs ==

Browser farming involves running multiple instances of a web browser (often headless, such as using [[Puppeteer]] or [[Selenium]]) to interact with the MediaWiki site. Each browser instance consumes CPU, memory, and network bandwidth. The primary bottleneck is typically RAM, as each browser, even headless, requires a substantial amount to operate efficiently.  Without sufficient RAM, the server will resort to swapping to disk, dramatically slowing down operations and potentially leading to server instability or even crashes.  

[[Caching]] plays a vital role, but even with aggressive caching, numerous concurrent browser instances necessitate a large RAM pool.  Consider also the impact of [[extensions]] running on the MediaWiki instance, as these all contribute to memory usage. 

== Hardware Specifications ==

The following table outlines the baseline hardware configuration used for testing and optimization.

{| class="wikitable"
! Component
! Specification
|-
| CPU
| Intel Xeon E5-2680 v4 (14 cores)
|-
| RAM
| 64 GB DDR4 2400MHz ECC Registered
|-
| Storage
| 1TB NVMe SSD (for OS and MediaWiki)
|-
| Network
| 1 Gbps Ethernet
|-
| Operating System
| Ubuntu Server 22.04 LTS
|}

It is important to note that the CPU and storage have a significant impact, but RAM is the focus of this article. Faster storage (NVMe SSDs) will mitigate some of the performance impact of RAM limitations, but cannot fully compensate for insufficient memory. The [[operating system]] chosen also affects resource management.

== Optimizing MediaWiki Configuration ==

Several MediaWiki configuration settings can be adjusted to reduce RAM usage. These settings are located in the `LocalSettings.php` file. Remember to clear the [[cache]] after making changes.

*   `$wgMainCacheType = 'Redis';` – Using Redis as the main cache significantly reduces database load and RAM usage compared to the default Memcached.  [[Redis configuration]] is essential for optimal performance.
*   `$wgParserCacheType = 'Redis';` –  Cache parsed wikitext in Redis.
*   `$wgJobRunLimit = 5;` – Limits the number of jobs run per cycle, preventing large bursts of activity that can consume excessive RAM.
*   `$wgCachePages = 65536;` – Controls the number of pages cached. Adjust based on available RAM.
*   `$wgUseTrackbacks = false;` – Disabling trackbacks reduces database and RAM usage.
*   `$wgEnableLua = false;` – If Lua scripting isn't essential, disabling it frees up RAM.  [[Lua scripting]] can be resource intensive.

== Monitoring RAM Usage ==

Regular monitoring of RAM usage is crucial. Tools like `top`, `htop`, `free -m`, and `vmstat` can provide valuable insights.  Consider installing a more sophisticated monitoring solution like [[Prometheus]] and [[Grafana]] for long-term trend analysis.  Pay close attention to swap usage; any significant swap activity indicates RAM is insufficient.

== Browser Farming Configuration and Limits ==

The number of concurrent browser instances you can run depends on the RAM available and the complexity of the tasks.  Start with a small number of instances (e.g., 5-10) and gradually increase it while monitoring RAM usage.  

Here's a table illustrating estimated RAM usage per browser instance (headless Chrome) for different task complexities:

{| class="wikitable"
! Task Complexity
! Estimated RAM Usage (per instance)
|-
| Simple Page Load
| 250 MB
|-
| Form Submission
| 500 MB
|-
| Complex JavaScript Execution
| 750 MB - 1 GB
|-
| Heavy Image Processing
| 1 GB +
|}

These are estimates; actual usage will vary.  A good rule of thumb is to leave at least 4 GB of RAM free for the operating system and other essential processes.  Therefore, with 64 GB of RAM, a safe maximum for browser farming might be around 40-50 concurrent instances, depending on the task complexity.

== Further Optimization ==

*   [[Database optimization]]: Regularly optimize the MediaWiki database to reduce its memory footprint.
*   [[Extension management]]:  Disable or uninstall unnecessary extensions.
*    [[Web server configuration]]: Optimize the web server (e.g., Apache or Nginx) for performance.  Consider using a reverse proxy like [[Varnish]] for caching.
*   [[PHP configuration]]: Adjust PHP memory limits and other settings to optimize performance.

== Conclusion ==

64 GB of DDR4 RAM provides a solid foundation for browser farming with MediaWiki. However, maximizing efficiency requires careful configuration of both the MediaWiki software and the browser farming environment. Regular monitoring and optimization are essential to ensure stable and reliable operation.  Proper [[server scaling]] may be required if the demands of browser farming increase substantially.



[[Special:Search]]
[[Special:Statistics]]
[[Help:Contents]]
[[Manual:Configuration]]
[[Manual:Caching]]
[[Manual:Database]]
[[Manual:Extensions]]
[[Manual:Command-line tools]]
[[MediaWiki FAQ]]

[[Category:Server Hardware]]


== Intel-Based Server Configurations ==
{| class="wikitable"
! 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 ==
{| class="wikitable"
! 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.* ⚠️