Reduce performance impact of ExitableDirectoryReader (#53978) #54014
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Benchmarking showed that the effect of the ExitableDirectoryReader is reduced considerably when checking every 8191 docs. Moreover, set the cancellable task before calling QueryPhase#preProcess() and make sure we don't wrap with an ExitableDirectoryReader at all when lowLevelCancellation is set to false to avoid completely any performance impact. Follows: elastic#52822 Follows: elastic#53166 Follows: elastic#53496 (cherry picked from commit cdc377e)
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Benchmarking showed that the effect of the ExitableDirectoryReader
is reduced considerably when checking every 8191 docs. Moreover,
set the cancellable task before calling QueryPhase#preProcess()
and make sure we don't wrap with an ExitableDirectoryReader at all
when lowLevelCancellation is set to false to avoid completely any
performance impact.
Follows: #52822
Follows: #53166
Follows: #53496
(cherry picked from commit cdc377e)