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 below maxPartitionQueueSize.
A fetch strategy that allows a stream to fetch data when its queue size is below maxPartitionQueueSize.
Value parameters
- maxPartitionQueueSize
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Maximum number of records to be 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 favour 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. A value that is a power of 2 offers somewhat better queueing performance. The default value for this parameter is 2 * the defaultmax.poll.recordsof 500, rounded to the nearest power of 2.
Attributes
- Supertypes
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trait Serializabletrait Producttrait Equalstrait FetchStrategyclass Objecttrait Matchableclass AnyShow all