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https://issues.apache.org/jira/browse/CASSANDRA-6487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059405#comment-15059405
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Paolo Ragone commented on CASSANDRA-6487:
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Hi, I wanted to echo the question from [~martin.grotzke], we're doing a similar
use in which we're saving an Aggregate as a list of "events" under the
aggregate key. What this means is that the batch is always limited to 1 key,
and therefore should be executed exclusively on one node and no intra-node
communication/dependency should be needed.
This is why I also think that this use should be safe.
I understand that the warning is just a warning, but better understanding this
can help shape better use of the Cassandra model.
> Log WARN on large batch sizes
> -----------------------------
>
> Key: CASSANDRA-6487
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6487
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Patrick McFadin
> Assignee: Lyuben Todorov
> Priority: Minor
> Fix For: 2.0.8, 2.1 beta2
>
> Attachments: 6487-cassandra-2.0.patch, 6487-cassandra-2.0_v2.patch
>
>
> Large batches on a coordinator can cause a lot of node stress. I propose
> adding a WARN log entry if batch sizes go beyond a configurable size. This
> will give more visibility to operators on something that can happen on the
> developer side.
> New yaml setting with 5k default.
> {{# Log WARN on any batch size exceeding this value. 5k by default.}}
> {{# Caution should be taken on increasing the size of this threshold as it
> can lead to node instability.}}
> {{batch_size_warn_threshold: 5k}}
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