Cache files grow indefinitely, despite 20 min expiration in code.

[bear454]

In Production, Rails is defaulting to file-based caching; with file caching the cache files never 'expire'... they must be removed (this is documented behavior [1]).

Eventually, /var/lib/rmt/tmp/cache will outgrow any disk.

[ngetahun]

@bear454 Can you shed some light on how you use rmt? Our reference hosts are functioning well, we would like to get a better understanding before we merge it to the codebase.

Have you tried setting up the rails cache to use the system /tmp folder?

[bear454]

This was filed on behalf of the SUSE Public Cloud Sysadmin team; some of the RMT servers in production supporting customers in AWS/Azure/GCP have over 6GB of Rails cache entries.

[bear454]

IMO regardless of the overall volume; there's a clear problem when using ActiveSupport::Cache::Filestore as the cache files never expire.