Hardware Requirements for Plesk Obsidian
We recommend that you read information about the product installation, upgrade, or migration before you start deploying Plesk. This information, including detailed instructions, can be found in the Deployment Guide.
For standard shared hosting servers meeting the criteria below, we recommend having 1GB of RAM for every 40-50 websites.
- Only 10% of all websites on shared hosting are active (have any persistent number of visitors per week/month).
- 128 MB of RAM is fine for most typical websites.
- WordPress: 64 MB
- Joomla: 64 MB
- Drupal: 128 MB
- Symfony: 128 MB
- No more than 1-3 simultaneous visitors per website, no more that 500 unique visitors per website per day.
If you are hosting websites that generate more traffic (5-10 simultaneous visitors per website, between 1000 and 30000 unique visitors per website), we recommend having between 500 MB and 1 GB of RAM per website.
In addition, having sufficient disk space for memory swapping is highly recommended:
|Amount of RAM on the server||Recommended free disk space for swapping|
|Less than 1 GB||1 GB|
|1 GB or more||1/2 * the amount of RAM|
We recommend having this much disk space for hosting:
|Type of hosting||Recommended free disk space for websites|
|Typical shared hosting (100-500 websites per server)||Between 2 and 2.5 GB per website|
|Dedicated VPS hosting (1-10 websites per server)||Between 4 and 12 GB per website|