Question about autovacuum function autovac_balance_cost()

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Тема Question about autovacuum function autovac_balance_cost()
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Msg-id CAJ3ejTw9WYFk6qkFX-5Hv8FxbcD2Mjtk3yn1g1ZET9H4FAVxVA@mail.gmail.com
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I am new to the autovacuum. After reading its code, I am still confusing what is the autovac_balance_cost() and how the cost logic works to make the autovacuum workers consume the I/O equially. Can anyone share some light on it?

Thanks

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