6ea2b5dec0
Today the processors setting is permitted to be set to more than the number of processors available to the JVM. The processors setting directly sizes the number of threads in the various thread pools, with most of these sizes being a linear function in the number of processors. It doesn't make any sense to set processors very high as the overhead from context switching amongst all the threads will overwhelm, and changing the setting does not control how many physical CPU resources there are on which to schedule the additional threads. We have to draw a line somewhere and this commit deprecates setting processors to more than the number of available processors. This is the right place to draw the line given the linear growth as a function of processors in most of the thread pools, and that some are capped at the number of available processors already. |
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