Clarify required async mode DB pool size about good_job HOT 2 CLOSED

Yep, those are inconsistent. The simplest and most up-to-date correction would be 2 + ENV.fetch("GOOD_JOB_MAX_THREADS", 5).to_i

That's also a little misleading because GOOD_JOB_MAX_THREADS isn't the total upperbound of threads, but more like "the default number of threads for a a configured pool" i.e. if you're using multiple pools (like default;other with the semicolon) that will be GOOD_JOB_MAX_THREADS * number-of-pools.

There's now a calculator:

Lastly, it's really not necessary to be precise with this number so long as the the number is larger than the maximum total threads. It would be safest to simply set this to 50 and not worry about it; the Active Record Database Connection Pool will never allocate more connections than it strictly needs. (I've heard rumors that Rails might even remove the pool size in the future because it's not very useful to configure)

from good_job.

Thanks for the clarification.

from good_job.