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Question regarding logical replication

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Dear postgresql community,

I have a question regarding understanding the implementation logic behind logical replication.

Assume a replication slot created on the master node, will more and more data get piled up in the slot and the size of replication slot continuously increase if there is no slave reading/dequeuing data out of this slot or very slowly, thus incurring high I/Os and slow down the transaction throughput?

Looking forward to your explanation.


Kindly review and please share your comments on this matter.




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