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Add section to Postgres FAQ #4533

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Oct 6, 2025
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Add section to Postgres FAQ #4533

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4 changes: 4 additions & 0 deletions docs/integrations/data-ingestion/clickpipes/postgres/faq.md
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Expand Up @@ -356,3 +356,7 @@ Yes, for a Postgres ClickPipe with replication mode as CDC or Snapshot + CDC, yo
<Image img={failover_slot} border size="md"/>

If the source is configured accordingly, the slot is preserved after failovers to a Postgres read replica, ensuring continuous data replication. Learn more [here](https://www.postgresql.org/docs/current/logical-replication-failover.html).

### I am seeing errors like `Internal error encountered during logical decoding of aborted sub-transaction` {#transient-logical-decoding-errors}

This error suggests a transient issue with the logical decoding of aborted sub-transaction, and is specific to custom implementations of Aurora Postgres. Given the error is coming from `ReorderBufferPreserveLastSpilledSnapshot` routine, this suggests that logical decoding is not able to read the snapshot spilled to disk. It may be worth trying to increase [`logical_decoding_work_mem`](https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-LOGICAL-DECODING-WORK-MEM) to a higher value.
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