Topic

Dalli

1 post about Dalli. Every summary links to the original.

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Posts

Heroku
Cache Invalidation Complexity: Rails 5.2 and Dalli Cache Store
Rails 5.2+ applications can fail to invalidate ActiveRecord-backed cache entries when cache versioning is enabled alongside a third-party store such as dalli_store 2.7.8 or earlier. Rails’ recyclable cache keys keep the cache_key stable and store an ActiveRecord cache_version in the entry, preventing unrelated entries from being evicted, but Dalli only understands the key and therefore repeatedly returns stale data. The post explains how to check the production cache_store and active_record.cache_versioning settings, then compares switching to Rails’ :mem_cache_store, disabling versioning, and upgrading Dalli to 2.7.9+. Its recommendation is to use :mem_cache_store and flush the cache, while noting that Dalli 2.7.9 fixes invalidation by putting the version into the key rather than implementing recyclable keys.

The best engineering reads, once a week.

Topic

1 post about Dalli. Every summary links to the original.

Paid picks we use ourselves. Links carry a referral code — a subscription through one earns us a commission at no extra cost to you.

Newest first

Heroku
Cache Invalidation Complexity: Rails 5.2 and Dalli Cache Store
Rails 5.2+ applications can fail to invalidate ActiveRecord-backed cache entries when cache versioning is enabled alongside a third-party store such as dalli_store 2.7.8 or earlier. Rails’ recyclable cache keys keep the cache_key stable and store an ActiveRecord cache_version in the entry, preventing unrelated entries from being evicted, but Dalli only understands the key and therefore repeatedly returns stale data. The post explains how to check the production cache_store and active_record.cache_versioning settings, then compares switching to Rails’ :mem_cache_store, disabling versioning, and upgrading Dalli to 2.7.9+. Its recommendation is to use :mem_cache_store and flush the cache, while noting that Dalli 2.7.9 fixes invalidation by putting the version into the key rather than implementing recyclable keys.

The best engineering reads, once a week.