Problem Statement: Problem Statement

This is again for performance reasons, adding an additional cpu vp dynamically thru autotune allows more resource availability to make those transactions complete quicker due to less likelihood of there being not enough cpu to complete a given operation quickly.

• Manual intervention is likely to be not as quick in many such cases.

Detection

• Detection

• CPU VPs are added whenever the average ready Q count across all the CPU VPs for the last minute exceeds 4.
• If the average depth of the ready Q is >= 5, we add another CPU VP up to a maximum of the number of physical processors on the box.
• Monitoring the ready queue (onstat –g rea, large number of threads sitting waiting), and the global usage of the CPU virtual processors (onstat –g glo, the eff column always at 100).
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