Re: logical replication and statistics

On Tue, Sep 26, 2017 at 2:50 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
>
>
> 2017-09-25 19:23 GMT+02:00 Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com>:
>>
>> On 25/09/17 19:19, Tom Lane wrote:
>> > Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
>> >> I had two instances on one server with different port. I am sure, so
>> >> replication was functional. Only one issue is statistics
>> >
>> >> Master:
>> >
>> >> CREATE TABLE foo(id int primary key, a int);
>> >> CREATE PUBLICATION test_pub FOR TABLE foo;
>> >> INSERT INTO foo VALUES(1, 200);
>> >
>> >> slave
>> >
>> >> CREATE TABLE foo(id int primary key, a int);
>> >> CREATE SUBSCRIPTION test_sub CONNECTION 'port=5432' PUBLICATION
>> >> test_pub;
>> >
>> >> That was all
>> >
>> > In this example, nothing's been done yet by the actual replication
>> > apply process, only by the initial table sync. Maybe that accounts
>> > for your not seeing stats?
>> >
>>
>> The main replication worker should still be running though. The output
>> of pg_stat_replication should only be empty if there is nothing running.
>>
>
> I did some inserts, updates, ..
>
> I can recheck it - it was done on 10 RC

I guess CREATE SUBSCRIPTION failed for whatever reason (e.g, wal_level
< logical on the master). Didn't you get errors from CREATE
SUBSCRIPTION?

Regards,

--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center