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Caching in the Apollo Router


The Apollo Router comes with an in-memory cache, used to store Automated Persisted Queries (APQ) and query plans. This is a Least Recently Used (LRU) cache, that can be configured as follows:

router.yaml
supergraph:
apq:
experimental_cache:
in_memory:
limit: 512
query_planning:
experimental_cache:
in_memory:
limit: 512

Introspection responses are cached too, but that cache is not configurable for now.

Experimental Redis cache

The Apollo Router has an experimental external storage cache, using Redis Cluster or a single Redis instance (if you provide only one url). It can be tested by building a custom Router binary, with the Cargo feature experimental_cache.

This will activate a configuration option to connect to a Redis Cluster:

supergraph:
apq:
experimental_cache:
in_memory:
limit: 512
redis:
urls: ["redis://..."]
query_planning:
experimental_cache:
in_memory:
limit: 512
redis:
urls: ["redis://..."]
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