Re: Pg10 : Client Configuration for Parallelism ?

By the way

On 4/17/2019 7:26, laurent.dechambe@orange.com wrote:
> I can see whether there is parallelism with pg_top or barely top on the server.
>
> <DBEAVER>
>     PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
>   38584 postgres  20   0 8863828 8.153g 8.151g R 100.0  3.2   1:23.01 postgres
>      10 root      20   0       0      0      0 S   0.3  0.0  88:07.26 rcu_sched
>
> <BASIC JDBC>
>     PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
>   46687 postgres  20   0 8864620 0.978g 0.977g S  38.5  0.4   0:01.16 postgres
>   46689 postgres  20   0 8864348 996.4m 995.1m R  38.5  0.4   0:01.16 postgres
>   46690 postgres  20   0 8864348 987.2m 985.8m S  38.5  0.4   0:01.16 postgres
>   46691 postgres  20   0 8864348 998436 997084 R  38.5  0.4   0:01.16 postgres
>   ...
>   46682 postgres  20   0  157996   2596   1548 R   0.7  0.0   0:00.05 top

If you just use top with the -c option, you will see each postgres 
process identify itself as to its role, e.g.

postgres: parallel worker for PID 46687

or

postgres: SELECT ...

or

postgres: wal writer

extremely useful this.

-Gunther