Re: Logical replication timeout problem

On Mon, Sep 20, 2021 at 4:10 PM Fabrice Chapuis <fabrice636861(at)gmail(dot)com> wrote:
>
> Hi Amit,
>
> We can replay the problem: we load a table of several Gb in the schema of the publisher, this generates the worker's timeout after one minute from the end of this load. The table on which this load is executed is not replicated.
>
> 2021-09-16 12:06:50 CEST [24881]: [1-1] user=postgres,db=db012a00,client=[local] LOG: duration: 1281408.171 ms statement: COPY db.table (col1, col2) FROM stdin;
>
> 2021-09-16 12:07:11 CEST [12161]: [1-1] user=,db=,client= LOG: automatic analyze of table "db.table " system usage: CPU: user: 4.13 s, system: 0.55 s, elapsed: 9.58 s
>
> 2021-09-16 12:07:50 CEST [3770]: [2-1] user=,db=,client= ERROR: terminating logical replication worker due to timeout
>
> Before increasing value for wal_sender_timeout and wal_receiver_timeout I thought to further investigate the mechanisms leading to this timeout.
>

The basic problem here seems to be that WAL Sender is not able to send
a keepalive or any other message for the configured
wal_receiver_timeout. I am not sure how that can happen but can you
once try by switching autovacuum = off? I wanted to ensure that
WALSender is not blocked due to the background process autovacuum.

--
With Regards,
Amit Kapila.