How often should I run the message consumers?

Magento 2.4.6

I am running this every minute via cronjob:

php bin/magento cron:run; > /dev/null 2>&1
php bin/magento queue:consumers:start product_action_attribute.update &
php bin/magento queue:consumers:start codegeneratorProcessor &
php bin/magento queue:consumers:start exportProcessor &

After a couple of minutes, my SQL server states “too many connections”. Tried disabling the cron job, which fixes the problem. I am sure its because of the consumers … is this not the way to run them?

Thanks!