The indices module controls index-related settings that are globally managed
for all indices, rather than being configurable at a per-index level.
Available settings include:
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Circuit breaker
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Circuit breakers set limits on memory usage to avoid out of memory exceptions.
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Fielddata cache
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Set limits on the amount of heap used by the in-memory fielddata cache.
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Node query cache
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Configure the amount heap used to cache queries results.
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Indexing buffer
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Control the size of the buffer allocated to the indexing process.
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Shard request cache
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Control the behaviour of the shard-level request cache.
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Recovery
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Control the resource limits on the shard recovery process.
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Search Settings
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Control global search settings.