autovacuum_vacuum_cost_delay

Hi everyone,

We are doing some tests with different autovacuum settings.

Looking at autovacuum_vacuum_cost_delay:

https://www.postgresql.org/docs/current/runtime-config-autovacuum.html#GUC-AUTOVACUUM-VACUUM-COST-DELAY

Can someone help to understand what a high or low value of this setting really means? Would it be OK to set this to 0? If not, why not?

Thanks in advance &
Best regards,

Manuel