Recommended resource limit values can vary widely depending on the specific use case, the type of application or service you're running, and the hardware specifications of your system. However, I can provide some general guidelines for common types of resources:

1. CPU (Central Processing Unit):

   • For a shared hosting environment, consider setting limits based on a fraction of the total available CPU cores. For example, limit each user or service to a certain percentage of CPU usage (e.g., 25%, 50%).
   • For dedicated servers or applications, set CPU limits based on the application's resource requirements and the expected load.

2. Memory (RAM):

   • Again, in shared hosting environments, allocate a portion of the total available RAM to each user or service. This might range from a few hundred megabytes to several gigabytes, depending on the nature of the applications.
   • For dedicated servers, allocate memory based on the specific requirements of the applications running. Ensure there is enough memory for the OS, services, and applications.

3. Disk Space:

   • Allocate disk space based on the type of content being hosted. For example, a blog might need significantly less space than a media-heavy website or a file storage service.
   • Consider regular monitoring and alerts for disk usage to prevent users from running out of space.

4. I/O (Input/Output):

   • Limit the number of read/write operations per second (IOPS) to prevent excessive disk activity. This can help ensure fair usage and prevent any single user or application from monopolizing resources.

5. Network Bandwidth:

   • Depending on your network infrastructure and available bandwidth, allocate bandwidth limits to users or services. This is especially important in shared hosting environments.

6. Connections:

   • Set limits on the number of concurrent connections a user or service can establish. This applies to services like web servers, database servers, and other network services.

7. Processes:

   • Define the maximum number of processes that a user or service can spawn. This helps prevent resource exhaustion due to excessive process creation.

8. File Descriptors:

   • Limit the number of file descriptors (open files) a user or service can have simultaneously. This prevents scenarios where a user opens an excessive number of files, potentially exhausting system resources.

9. Threads:

   • Set limits on the number of threads a user or service can create. This is important for preventing excessive memory usage due to thread proliferation.

10. Database Connections:

    • For database servers, set limits on the number of concurrent connections each user or application can establish. This helps prevent overloading the database server.

Always consider load testing and monitoring to ensure that the allocated resources are sufficient for your specific workload. These recommended values are starting points and may need to be adjusted based on actual usage patterns and performance requirements. Additionally, be prepared to fine-tune these limits as your applications and user base evolve.