[IGNITE-13932] Extend Ignite thread pools documentation

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.9
• Component/s: documentation
• Ignite Flags: Docs Required
• Assignee: Nikita A. Safonov
• Reporter: Nikita A. Safonov
• Reviewer: Denis A. Magda
• Due: 15/Jan/21
• Created: 29/Dec/20 13:38
• Updated: 29/Dec/20 13:38

Description

There are references in the code to three thread pools that don't appear to be referenced in the Ignite thread pool documentation at https://apacheignite.readme.io/docs/thread-pools. 
 
These are:
 
asyncCallbackThreadPoolSize
managementThreadPoolSize
utilityCacheThreadPoolSize

 
By default these pools will be set to Max(8, Environment.ProcessorCount) []we use the IA C# client]
 
Note: These configurations are referenced in the Ignite Javadoc pages, but the descriptions are just single sentences mirroring the names of the thread pools themselves.
 
The thread pool documentation should be extended to include these additional pools, particularly with respect to their purpose and roles, and the circumstances when you would change them from the default value.