On Fri, 22 Oct 2021, Sung Hsin Lei via Slony1-general wrote:
This question may have been asked already. I have noticed that if it takes 10 days for the initial data transfer to complete, if the transfer is interrupted after 9 days, the transfer resumes from day 1. In other words, I need 10 days of uninterrupted connection between the master and slave machine for replication to be established properly. Is this the case or did I mess up somewhere? Another question. On a new replication(empty tables on the slave), I see the initial transfer stuck on TRUNCATE for a long time for big tables. Sometimes, it truncates the same table several times. I remember getting an explanation for why it is so. Is there a way to make the initial transfer faster(avoiding the truncate)?
If you already have at least one replica you might be able to use CLONE PREPARE / CLONE FINISH and OMIT COPY to speed things up.
Truncates taking a long time might be because you have an open transaction with locks against the table.
Regards Sung
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