citus cluster during SELECT-only pgbench test

Original query:

===== citus-db-test1 =====
  PID STAT  C %MEM CMD
19059 S     0  0.8 /usr/lib/postgresql/11/bin/postgres -D /var/lib/postgresql/11/citusmaster -c config_file=/etc/postgresql/11/citusmaster/postgresql.conf
19060 Ss    0  0.0 postgres: 11/citusmaster: logger   
19062 Ss    0  0.2 postgres: 11/citusmaster: checkpointer   
19063 Ss    0  0.2 postgres: 11/citusmaster: background writer   
19064 Ss    0  0.0 postgres: 11/citusmaster: walwriter   
19065 Ss    0  0.0 postgres: 11/citusmaster: autovacuum launcher   
19066 Ss    0  0.0 postgres: 11/citusmaster: stats collector   
19067 Ss    0  0.0 postgres: 11/citusmaster: task tracker   
19068 Ss    0  0.0 postgres: 11/citusmaster: logical replication launcher   
19239 Ss    0  0.0 postgres: 11/citusmaster: Citus Maintenance Daemon: 17193/10   
19384 Ss   10  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47616) idle
19385 Ss   11  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47618) idle
19386 Ss   11  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47620) idle
19387 Ss   11  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47622) idle
19388 Ss   10  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47624) idle
19389 Ss   10  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47626) idle
19390 Ss   10  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47628) idle
19391 Rs   10  0.0 postgres: 11/citusmaster: postgres woodpecker_load 172.16.82.190(47630) SELECT
===== citus-db-test2 =====
  PID STAT  C %MEM CMD
20494 S     0  0.8 /usr/lib/postgresql/11/bin/postgres -D /var/lib/postgresql/11/citusworker1 -c config_file=/etc/postgresql/11/citusworker1/postgresql.conf
20496 Ss    0  0.0 postgres: 11/citusworker1: logger   
20498 Ss    0  0.2 postgres: 11/citusworker1: checkpointer   
20499 Ss    0  0.2 postgres: 11/citusworker1: background writer   
20500 Ss    0  0.0 postgres: 11/citusworker1: walwriter   
20501 Ss    0  0.0 postgres: 11/citusworker1: autovacuum launcher   
20502 Ss    0  0.0 postgres: 11/citusworker1: stats collector   
20503 Ss    0  0.0 postgres: 11/citusworker1: task tracker   
20504 Ss    0  0.0 postgres: 11/citusworker1: logical replication launcher   
20510 Ss    0  0.0 postgres: 11/citusworker1: Citus Maintenance Daemon: 17193/10   
21139 Ss    0  0.0 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43048) idle
21383 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43498) idle
21384 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43504) idle
21385 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43508) idle
21386 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43516) idle
21387 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43518) idle
21388 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43522) idle
21389 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43524) idle
21392 Ss    3  1.2 postgres: 11/citusworker1: postgres woodpecker_load 172.16.82.200(43528) idle
===== citus-db-test3 =====
  PID STAT  C %MEM CMD
 7131 S     0  1.3 /usr/lib/postgresql/11/bin/postgres -D /var/lib/postgresql/11/citusworker2 -c config_file=/etc/postgresql/11/citusworker2/postgresql.conf
 7132 Ss    0  0.0 postgres: 11/citusworker2: logger   
 7134 Ss    0  0.3 postgres: 11/citusworker2: checkpointer   
 7135 Ss    0  0.3 postgres: 11/citusworker2: background writer   
 7136 Ss    0  0.0 postgres: 11/citusworker2: walwriter   
 7137 Ss    0  0.0 postgres: 11/citusworker2: autovacuum launcher   
 7138 Ss    0  0.0 postgres: 11/citusworker2: stats collector   
 7139 Ss    0  0.0 postgres: 11/citusworker2: task tracker   
 7140 Ss    0  0.0 postgres: 11/citusworker2: logical replication launcher   
 7146 Ss    0  0.0 postgres: 11/citusworker2: Citus Maintenance Daemon: 17193/10   
 7370 Ss    0  0.0 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56162) idle
 7610 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56614) idle
 7611 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56618) idle
 7612 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56622) idle
 7613 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56626) idle
 7614 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56628) idle
 7615 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56630) idle
 7616 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56636) idle
 7617 Ss    3  1.9 postgres: 11/citusworker2: postgres woodpecker_load 172.16.82.200(56642) idle