Question about openfga_cache_item_count metric

[anthonytu8]

Hi,

We recently implemented ReBAC authentication for a service using OpenFGA v1.11.5. From our understanding, OPENFGA_CHECK_QUERY_CACHE_MAX_ENTRIES is set to 100K by default. However, looking at the openfga_cache_item_count metric, the cache item count seems to be unbounded and continues increasing until a pod recycle or redeploy. Our pod memory doesn't seem to follow the same trend so it doesn't appear that the cache is truly unbounded. We see cache evictions as well which also supports that the cache storage limit is being applied.

So the question is - what does the openfga_cache_item_count metric really measure?

[senojj]

This sounds related to issue openfga/openfga#2944