zio.kafka.consumer.fetch
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A fetch strategy determined which stream are allowed to fetch data in the next poll.
A fetch strategy determined which stream are allowed to fetch data in the next poll.
WARNING: this is an EXPERIMENTAL API and may change in an incompatible way without notice in any zio-kafka version.
Attributes
- Supertypes
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class Objecttrait Matchableclass Any
- Known subtypes
A fetch strategy that allows a stream to fetch data when its queue size is at or below partitionPreFetchBufferLimit.
A fetch strategy that allows a stream to fetch data when its queue size is at or below partitionPreFetchBufferLimit.
Value parameters
- partitionPreFetchBufferLimit
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The queue size at or below which more records are fetched and buffered (per partition). This buffer improves throughput and supports varying downstream message processing time, while maintaining some backpressure. Large values effectively disable backpressure at the cost of high memory usage, low values will effectively disable prefetching in favor of low memory consumption. The number of records that is fetched on every poll is controlled by the
max.poll.recordssetting, the number of records fetched for every partition is somewhere between 0 andmax.poll.records. The default value for this parameter is 2 * the defaultmax.poll.recordsof 500, rounded to the nearest power of 2. The value0disables pre-fetching.
Attributes
- Supertypes
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trait Serializabletrait Producttrait Equalstrait FetchStrategyclass Objecttrait Matchableclass AnyShow all