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A comment on Postgres, Kafka, and a mysterious 100 GB.

Re:Postgres, Kafka, and a mysterious 100 GB by aeyes on Tuesday December 07, 2021 @06:25PM (#29479494)
The write activity every 5 minutes is standard Postgres checkpointing, the default value for checkpoint_timeout is 5 minutes. This is not limited to RDS.

Background processes like vacuum and analyze also write to WAL.

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Re:Postgres, Kafka, and a mysterious 100 GB by ritmatter on Wednesday December 08, 2021 @09:21AM (#29484986)
Thanks, I didn't know that. Why do you think the Debezium docs call out this behavior specifically for RDS (https://debezium.io/documentation/reference/stable/connector...)? I'm wondering if there is any difference for RDS vs other hosting methods.
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