Managed to deploy a multi-page Streamlit App on Google Cloud Run. However, even with minimal traffic (just family and friends), Google Cloud Run is costing about ~$1-$2 a day. Seems way too expensive. Can’t seem anything obvious either.
Capacity:
256MiB
1 CPU
1800 request timeout (30 mins) – else session states are wiped
80 max requests per container
Execution environment: Default (I checked, GCP is using First Gen)
Autoscaling: 1 min instance + 100 max instances
Anyone has seen something similar? Or, anyone has rough Google Cloud Run cost for their streamlit app that they can share?
We experience similar costs for the Streamlit apps we host on Google Cloud Run, but of course, this depends a lot on the deployment parameters.
Read through the Google Cloud Run pricing documentation - these three considerations might help you reduce your costs:
CPU allocation: The prices for “CPU always allocated” are lower than the prices for “CPU only allocated during request processing”. You also get more free vCPU-seconds and GiB-seconds.
Region: Prices for Tier 1 regions are lower than prices for Tier 2 regions.
Committed use discounts (CUD): This option allows you get a significant discount if you commit (i.e. no refunds) to a certain usage.
It seems like this may just be the baseline cost from self-hosting a Streamlit application on a serverless stack. Every 10-15 minutes or so, I am observing pings to “st-allowed-message-origins” and “stream” from Streamlit server – and these pings are essentially causing a container to be kept alive throughout the day – even when is no actual traffic.
Can’t seem to find a way to control this behavior in streamlit configs either.
I upgraded my streamlit version to 1.19.0 late Friday. After that, Cloud Run billing is now much more reasonable. My guess is https://github.com/streamlit/streamlit/pull/5534 was the cause of what I was seeing.
Our apps might see 3-5 concurrent users at peak times, but never go beyond 1 active container instance (always active since we use “CPU always allocated”). This depends a lot on your app’s code, of course, and not intended as a benchmark. For example: If your app performs CPU-intensive calculations, then keep in mind Google Cloud Run automatically monitors CPU usage, and if it goes high enough, will trigger a new container instance regardless of how many concurrent requests.
Regarding Streamlit version 1.19.0 reducing Google Cloud Run costs, thanks a lot for the heads-up, we will test this over the next few days. It would also be great to know if the Streamlit team has more insight into what is causing this great side effect.
I would like to add:
Google Cloud Run may not be the cheapest cloud service platform/provider for Streamlit Apps. A Streamlit app is actually a classic web server application that runs 24/7. Maybe you should just rent a small VPS from a classic server provider (Digitalocean, Vultr, OVH, Ionos and many more…) for about 5-10$ per month. Put the Streamlit app in a Docker container and add a second container with a reverse proxy.
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has more insight into what is causing this great side effect 
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