[MapServer-dev] GitHub Action cache limit changes coming 15 October

[Jeff McKenna]

Hi all,

I recently received a warning from GitHub of the following:

********
Subject: Your total cache usage exceeds upcoming caching limits

Hello,

GitHub Actions is changing it’s cache policies beginning on October 
15th, 2025. In the past, all repositories received a maximum 10GB of 
cache. After this date, all repositories will receive 10GB for free and 
have the option to pay for additional storage at a per GB/month rate 
that is checked at hourly intervals.

You are receiving your email because your consumption exceeds 10GB 
within a 24 hour period. As a result, you will need to do one of the 
following:

     Increase your cache retention past 10GB: This will have an 
associated cost but you will keep all cache up to the limit you set.
     Maintain your existing limit of 10GB: This will not occur 
additional cost, but your least recently used cache will be evicted once 
it reaches the 10GB limit
     Modify caching practices: If you reduce what is cached, you will 
not hit the limit
*******

I have been following the QGIS-PSC discussion about this: 
https://lists.osgeo.org/pipermail/qgis-psc/2025-September/010649.html

I have checked the GitHub Actions cache section of the MapServer repo, 
and I see several >=1GB entries, some from even 3 weeks ago, still in 
our cache for "micromamba-environment" (from I believe our Conda builds).

(now to be very honest, I think the above "Your total cache usage 
exceeds" message was sent to my @jmckenna GitHub account, likely 
regarding my own cache in my jmckenna account, not specifically for 
github.com/MapServer/MapServer but I think it's good to make others 
aware of this in the MapServer PSC)

I see that we can add a custom action to delete older cache after X days 
etc. but I haven't experimented with that yet.

Thoughts?

(I have also added this to the PSC meeting agenda)

thanks,

-jeff



-- 
Jeff McKenna
GatewayGeo: Developers of MS4W, & offering MapServer Consulting/Dev
co-founder of FOSS4G
http://gatewaygeo.com/