Cognos Analytics v11.0.13 - Report Service configuration

[rd152343]

Hi Gurus,

Little confused with configuring Number of Report services Process for Cognos Analytics 11.0.13 environment.

We use Cognos 11.0.13 within our application, Our cognos reports are transactional reports, displaying data real time, hence users expects data without delay.

I have referred to some of the posts in this forum and came to conclusion based on the information provided in these posts
https://www.cognoise.com/index.php?topic=29443.0
https://www.cognoise.com/index.php?topic=7383.0
https://www.cognoise.com/index.php?topic=34146.0

Maximum Number of Report Service Processes = Number of CPU's * 2.
Number of Concurrent Report Execution (the system can support) = Number of Report Service Process * (Number of High Affinity + Number of Low Affinity connection).
Each BiBUS process can take max of 2 GB of memory.

Questions:

What does a Report service Process mean? Does each report execution spawns one BiBUS process? If yes, then number of concurrent report execution = Number of CPU * 2, where number of live users will depend on Number of CPU. Is that correct?
Though Number of report service depends on Number of CPU's, should we not account for available memory before modifying the Maximum Number of Report Service Processes in cognos connection?
Example - 16 GB with 8 CPU, if Maximum Number of Report Service Processes =8, will this not cause a memory issue?
Is it mandatory to have Content Manager separately from Application tier? Will there be a performance impact if Content Manager and dispatcher services are running on the same machine?
Increasing the number of CPU's, will it have an impact on the performance of reports?

Thanks!