Gian Merlino 37853f8de4 ConcurrentGrouper: Add mergeThreadLocal option, fix bug around the switch to spilling. (#12513) ... * ConcurrentGrouper: Add option to always slice up merge buffers thread-locally. Normally, the ConcurrentGrouper shares merge buffers across processing threads until spilling starts, and then switches to a thread-local model. This minimizes memory use and reduces likelihood of spilling, which is good, but it creates thread contention. The new mergeThreadLocal option causes a query to start in thread-local mode immediately, and allows us to experiment with the relative performance of the two modes. * Fix grammar in docs. * Fix race in ConcurrentGrouper. * Fix issue with timeouts. * Remove unused import. * Add "tradeoff" to dictionary.		2022-05-21 10:28:54 -07:00
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src	ConcurrentGrouper: Add mergeThreadLocal option, fix bug around the switch to spilling. (#12513)	2022-05-21 10:28:54 -07:00
pom.xml	Free ByteBuffers in tests and fix some bugs. (#12521)	2022-05-19 07:42:29 -07:00