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List:       postgresql-general
Subject:    Re: [HACKERS] logical replication - still unstable after all these months
From:       Erik Rijkers <er () xs4all ! nl>
Date:       2017-05-31 14:20:00
Message-ID: cf6a7c956f9346667bbbdaab64b1b562 () xs4all ! nl
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On 2017-05-31 11:16, Petr Jelinek wrote:
[...]
> Thanks to Mark's offer I was able to study the issue as it happened and
> found the cause of this.
> 
> [0001-Improve-handover-logic-between-sync-and-apply-worker.patch]

This looks good:

-- out_20170531_1141.txt
     100 -- pgbench -c 90 -j 8 -T 60 -P 12 -n   --  scale 25
     100 -- All is well.

So this is 100x a 1-minute test with 100x success. (This on the most 
fastidious machine (slow disks, meagre specs) that used to give 15% 
failures)

I'll let it run for a couple of days with varying params (and on varying 
hardware) but it definitely does look as if you fixed it.

Thanks!

Erik Rijkers


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