Re: Perform streaming logical transactions by background workers and parallel apply

On Tue, Dec 27, 2022 at 10:24 AM wangw(dot)fnst(at)fujitsu(dot)com
<wangw(dot)fnst(at)fujitsu(dot)com> wrote:
>
> Attach the new version patch which addressed all above comments and part of
> comments from [1] except one comment that are being discussed.
>

1.
+# Test that the deadlock is detected among leader and parallel apply workers.
+
+$node_subscriber->append_conf('postgresql.conf', "deadlock_timeout = 1ms");
+$node_subscriber->reload;
+

A. I see that the other existing tests have deadlock_timeout set as
10ms, 100ms, 100s, etc. Is there a reason to keep so low here? Shall
we keep it as 10ms?
B. /among leader/among the leader

2. Can we leave having tests in 022_twophase_cascade to be covered by
parallel mode? The two-phase and parallel apply will be covered by
023_twophase_stream, so not sure if we get any extra coverage by
022_twophase_cascade.

3. Let's combine 0001 and 0002 as both have got reviewed independently.

--
With Regards,
Amit Kapila.