Intel 170 Servers Manual Do Utilizador

On the new systems and mixed mode servers have the QDYNPTYSCD and  QDYNPTYADJ system
value set on.  This preserves non-interactive capacities and the interactive response times will be dynamic
beyond the knee regardless of the setting. Also set non-interactive class run priorities to less than 35.

On earlier servers and 2/98 model 170 systems use your interactive requirements to determine the
settings.  For “pure interactive” environments turn the QDYNPTYADJ system value off.  in mixed
environments with important non-interactive work, leave the values on and change the run priority of
important non-interactive work to be less than 35.

Server Dynamic Tuning - .

High "Server" Demand

Server Dynamic Tuning

Mixed "Server" Demand

With sufficient batch or 
client/server load, 
Interactive is constrained 
to the "knee-level" by 
priority degradation

Interactive suffers poor 
response times

Without high "server" 
demand, Interactive 
allowed to grow to limit

Overhead introduced just 
as when Dynamic Priority 
Adjust is turned off

Affects of Server Dynamic Tuning

Figure 2.6.

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008

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 Copyright IBM Corp. 2008