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Re: Missing rows after migrating from postgres 11 to 12 with logical replication

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On 12/21/20 2:42 PM, Lars Vonk wrote:
    What was being run when the above ERROR was triggered?


The initial copy of a table. Other than that we ran select pg_size_pretty(pg_relation_size('table_name')) to see the current size of the table being copied to get a feeling on progress.

And whenever we added a new table to the publication we ran ALTER SUBSCRIPTION migration REFRESH PUBLICATION; to add any new table to the subscription. But not around that timestamp, about 50 minutes before the first occurence of that ERROR. (no ERRORS after prior ALTER SUBSCRIPTIONs).

But after the initial copy's ended there are more ERROR's on different WAL segments missing. Each missing wal segment is logged as ERROR a couple of times and then no more. After a couple of hours no errors are logged.

Something was looking for the WAL segment.

Did you have some other replication running on the 11 instance?

In any case what was the command logged just before the ERROR.


Lars



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx





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