[Backport 2.4] [Backport 2.x] In-flight cancellation of SearchShardTask based on resource consumption #5058
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…ource consumption (#5039) * [Backport 2.x] Added in-flight cancellation of SearchShardTask based on resource consumption (#4575) This feature aims to identify and cancel resource intensive SearchShardTasks if they have breached certain thresholds. This will help in terminating problematic queries which can put nodes in duress and degrade the cluster performance. * [Backport 2.x] Added resource usage trackers for in-flight cancellation of SearchShardTask (#4805) 1. CpuUsageTracker: cancels tasks if they consume too much CPU 2. ElapsedTimeTracker: cancels tasks if they consume too much time 3. HeapUsageTracker: cancels tasks if they consume too much heap * [Backport 2.x]Added search backpressure stats API Added search backpressure stats to the existing node/stats API to describe: 1. the number of cancellations (currently for SearchShardTask only) 2. the current state of TaskResourceUsageTracker Signed-off-by: Ketan Verma <ketan9495@gmail.com> (cherry picked from commit 7c521b9)
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…d on resource consumption (opensearch-project#5039) (opensearch-project#5058)" This reverts commit def9db1.
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Backport 7c521b9 from #5039