[gpadmin@test-4 ~]$ gpconfig -c shared_buffers -v '128kB'
[gpadmin@test-4 ~]$ gpstop -r -a
20200506:08:53:56:3458821 gpstart:test-4:gpadmin-[CRITICAL]:-Failed to start Master instance in admin mode
20200506:08:53:56:3458821 gpstart:test-4:gpadmin-[CRITICAL]:-Error occurred: non-zero rc: 1
 Command was: 'env GPSESSID=0000000000 GPERA=None $GPHOME/bin/pg_ctl -D /opt/gp/gpmaster/gpseg-1 -l /opt/gp/gpmaster/gpseg-1/pg_log/startup.log -w -t 600 -o " -p 7456 -c gp_role=utility " start'
rc=1, stdout='waiting for server to start.... stopped waiting
', stderr='pg_ctl: could not start server
Examine the log output.
'
', stderr=''