Commits on Feb 24, 2020

1. CopyScanCache pool size …

   Reduce max and increment size of the pool by factor of 3.4x
   
   This is effectively fixing a regression where this pool increased due to
   decrease of minimum copy cache size from 32K to 8K about a couple of
   years ago.
   
   The heuristic for the size of the pool is now based on both min and max
   size of copy cache. Relying on just min size was too conservative. If GC
   dynamically decided to use small copy caches it means that parallelism
   is low, what in turn means that scan queue is mostly empty, hence the
   need for the caches is low.
   
   Signed-off-by: Aleksandar Micic <amicic@ca.ibm.com>

   

   amicic committed Feb 24, 2020
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