Charles Allen 2e1d6aaf3d Use thread priorities. (aka set `nice` values for background-like tasks) ... * Defaults the thread priority to java.util.Thread.NORM_PRIORITY in io.druid.indexing.common.task.AbstractTask * Each exec service has its own Task Factory which is assigned a priority for spawned task. Therefore each priority class has a unique exec service * Added priority to tasks as taskPriority in the task context. <0 means low, 0 means take default, >0 means high. It is up to any particular implementation to determine how to handle these numbers * Add options to ForkingTaskRunner * Add "-XX:+UseThreadPriorities" default option * Add "-XX:ThreadPriorityPolicy=42" default option * AbstractTask - Removed unneded @JsonIgnore on priority * Added priority to RealtimePlumber executors. All sub-executors (non query runners) get Thread.MIN_PRIORITY * Add persistThreadPriority and mergeThreadPriority to realtime tuning config		2016-01-20 14:00:31 -08:00
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main	Use thread priorities. (aka set `nice` values for background-like tasks)	2016-01-20 14:00:31 -08:00
test/java/io/druid	SegmentMetadataQuery merging fixes.	2015-12-22 07:57:10 -08:00