According to heroku
Starting today, Heroku accounts have an account-based pool of free dyno hours for use on free apps. This replaces the 18 hours a day limit on free apps, allowing a free app to run 24/7 if needed. New accounts receive 550 free dyno hours and you can verify your identity with a credit card for an additional 450 hours
→ How are dyno hours calculated
If my app is always up, how many days will it stay up for (If I have 550 dyno hours) or does it depend on traffic and usage?
An app consumes hours based on their uptime, no matter the usage or traffic your app receives.
If you do the math, 550 hours is equal to 22.92 days.
If you were to add your payment method, it would give you a thousand hours, enough for a single app to run 24/7.
Related
I have a question about running my Twitter bot 24/7, and I already have it uploaded to Heroku. The code works great.
However, the dynos will fall asleep after 30 minutes of non-use. This is great, however, my code is programming to tweet the same thing once a day.
In order to keep the dynos alive, the code has to be run every 30 minutes. The tweet, however, is the same thing once a day.
Is there a way to keep the Twitter code running when receiving a duplicate?
It seems like you want to bypass the limit, but that is not possible. if you keep running that service all day your free hours will expire.
Verified accounts come with a monthly pool of 1000 Free dyno hours; unverified >accounts receive 550. When a Free dyno is active, it draws from the pool; your free >apps can run as long as there are dyno hours left in your monthly pool.
instead, better to upgrade the Heroku to the premium version.
I need to be able to run my Heroku app 24/7 even when no one is currently viewing it. It's primarily a server side application that I need to constantly be running at all times.
What's the cheapest and best way to go about doing this. I don't mind paying as long as I'm not paying unnecessarily.
Thank you.
You have three options:
Hobby subscription
Free Web Dyno
Free Worker Dyno
(1) Go for the Hobby subscription: 7$ per month, the Dyno is 24/7 up and running
(2) Use the Free tier, register a valid credit card which gives you extra free Dyno hours (total of 1000 hours) and make sure the Dyno is always up.
The Free Web Dyno sleeps after 30 min inactivity (ie no incoming requests for 30 minutes): you can prevent this sending a request (from an external tool or script) every 20 min.
(3) Use the Free tier (again register a valid credit card to be eligible to 1000 free hours) with a Worker Dyno only (free worker dyno do not sleep)
More info at Free Dyno Sleeping
I've had this heroku account for almost two weeks, but in the billing section my free dyno hours used this month remains at 0%. This isn't possible because I've set an uptimerobot to hit my heroku API every 29 minutes (to prevent it from sleeping).
Contemplating upgrading to Hobby so accurate info is nice to have here.
If I only have one active app is it possible that it could spend all free Dyno hours quota?
My app is a PHP process which is always active (while (true) { do_something}). I launch this process as a worker.
I thought the free Dyno hours quota were like real hours so you can spent 24h as max per day. But if I view my remaining free hours quota in two consecutive days using 'heroku ps -a app' command then I get that I am spending more than 24h per day.
Another question, how many hours do you have in a Hobby plan?
If you are running 2 dynos (for example, a web dyno and a worker dyno), they will each use 24 hours, for a total of 48 dyno hours used in a day. Of course in reality it would probably be less than 24 hours each, if the dynos slept for part of the day.
I solved my problem disabling the web Dyno.
Is heroku's free 750 hours separate per app, or is it a total of 750 hours shared across all your apps?
From their site:
"Each app you create has free access to 750 dyno-hours per month and a starter-tier database."
However, from another answer on StackOverflow:
"Heroku provides, for free, 1 dyno. A dyno is an instance of your application running and responding to requests. If each instance of your application can serve each request in 100ms, then you get 600 requests/minute with the free account."
Based off of what it says there and my experience it's per app. That's talking about instances of dynos not apps. "If each instance of your application can serve each request in 100ms, then you get 600 requests/minute with the free account."
Each app you create within Heroku gets 750 dyno-hours per month for free. The number of requests your app can receive depend on the configuration of the app. For example, an app running unicorn can handle more requests than an app running something else, as unicorn can run multiple workers per dyno.
I've personally run an app on Heroku with 3 unicorn workers on one dyno, 24 hours a day, all month, and always been free (because that is ~750 dyno-hours).