Best setup for Supervisor to deal with queues

Hello,

I am having problems with sometimes queue items not being sent, just staying in the jobs database.

Currently I have supervisor set on the server with these settings;

[program:laravel-worker]
command=/usr/bin/php /home/xxxxxxxxxxxx/laravel/artisan queue:work --sleep=3 --tries=3
process_name =%(program_name)s_%(process_num)02d
numprocs=8
priority=999
autostart=true
autorestart=true
startsecs=1
startretries=3
user=xxxxxxxxxxxxxx

Would oyu recommend different settings please? Are mine correct?

Thank you.