Re: Deadlock between concurrent index builds on different tables

El 23/12/17 a las 08:08, Alban Hertroys escribió:
>
>> On 22 Dec 2017, at 22:53, Jeremy Finzel <finzelj(at)gmail(dot)com> wrote:
>>
>> 2017-12-22 15:48:07.669 CST,"CREATE INDEX",2017-12-22 15:48:02 CST,8/32,0,ERROR,40P01,"deadlock detected","Process 4470 waits for ShareLock on virtual transaction 4/262; blocked by process 4466.
>> Process 4466 waits for ShareLock on virtual transaction 8/32; blocked by process 4470.
>> Process 4470: CREATE INDEX CONCURRENTLY index_foo_on_created_at ON foo USING btree (created_at);
>> Process 4466: CREATE INDEX CONCURRENTLY index_bar_on_id ON bar USING btree (id);","See server log for query details.",,,,"CREATE INDEX CONCURRENTLY index_foo_on_created_at ON foo USING btree (created_at);",,,""
>
> If I read these logs correctly, you are creating the exact same index on foo (created_at) in both processes, which is just what you were trying to prevent doing.

They are two distinct indexes. One on foo(create_at) and the other on
bar(id)

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