Rob,

> I would like to see the same, as I have a system that exhibits the same 
behavior
> on a production db that's running 7.4.1.

If you checked the thread follow-ups,  you'd see that *decreasing* 
spins_per_delay was not beneficial.   Instead, try increasing them, one step 
at a time:

(take baseline measurement at 100)
250
500
1000
1500
2000
3000
5000

... until you find an optimal level.   Then report the results to us!

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco


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