memory

Stores consumed messages in memory and acknowledges them at the input level. During shutdown Benthos will make a best attempt at flushing all remaining messages before exiting cleanly.

buffer:
memory:
limit: 524288000
batch_policy:
enabled: false
count: 0
byte_size: 0
period: ""

This buffer is appropriate when consuming messages from inputs that do not gracefully handle back pressure and where delivery guarantees aren't critical.

This buffer has a configurable limit, where consumption will be stopped with back pressure upstream if the total size of messages in the buffer reaches this amount. Since this calculation is only an estimate, and the real size of messages in RAM is always higher, it is recommended to set the limit significantly below the amount of RAM available.

Batching

It is possible to batch up messages sent from this buffer using a batch policy.

Fields

limit

number The maximum buffer size (in bytes) to allow before applying backpressure upstream.

batch_policy

object Optionally configure a policy to flush buffered messages in batches.

batch_policy.enabled

bool Whether to batch messages as they are flushed.

batch_policy.count

number A number of messages at which the batch should be flushed. If 0 disables count based batching.

batch_policy.byte_size

number An amount of bytes at which the batch should be flushed. If 0 disables size based batching.

batch_policy.period

string A period in which an incomplete batch should be flushed regardless of its size.

# Examples
period: 1s
period: 1m
period: 500ms

batch_policy.condition

object A condition to test against each message entering the batch, if this condition resolves to true then the batch is flushed.

batch_policy.processors

array A list of processors to apply to a batch as it is flushed. This allows you to aggregate and archive the batch however you see fit. Please note that all resulting messages are flushed as a single batch, therefore splitting the batch into smaller batches using these processors is a no-op.

# Examples
processors:
- archive:
format: lines
processors:
- archive:
format: json_array
processors:
- merge_json: {}