f174f72fee
With this commit we introduce a new circuit-breaking strategy to the parent circuit breaker. Contrary to the current implementation which only accounts for memory reserved via child circuit breakers, the new strategy measures real heap memory usage at the time of reservation. This allows us to be much more aggressive with the circuit breaker limit so we bump it to 95% by default. The new strategy is turned on by default and can be controlled with the new cluster setting `indices.breaker.total.userealmemory`. Note that we turn it off for all integration tests with an internal test cluster because it leads to spurious test failures which are of no value (we cannot fully control heap memory usage in tests). All REST tests, however, will make use of the real memory circuit breaker. Relates #31767 |
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