Invalidating query cache

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Also, since I am using queries to fetch entities, avoiding query-cache is also not an option The query cache is not useful for write-mostly applications, as you probably figured out yourself.There is no write-through query caching option, so you need to question why you are using this feature in the first place.Rows: ~49,917,839 Inno DB latin1_swedish_ci Size: 28.7 Gi B I've now yet been able to repeat with 100% accuracy.Any help as to how best to test my theory would be greatly appreciated.I'm trying to understand how hibernate query cache really works.What I see now is that Hibernate does not update its second-level cache automatically when I insert new entities into the database (although I'm using only Hibernate calls).I guess it can not easily know what cache to invalidate when you modify data.

but really, this looks mostly like a case of the actual thread status being misreported, and your issue is insufficient disk I/O bandwidth for the workload (or excessive flushing).That is, even if the query cache is not enabled, the mutex (slow, by nature) to access the (not existing) query cache is acquired for every binlog event.The only way to not acquire the query cache mutex in My SQL pre-5.5 is to compile My SQL without query cache. For My SQL 5.5 , to completely disable the query cache (thus, not acquiring the query cache mutex) is required to set query_cache_type=OFF at startup (not at runtime).Yes, query cache auto invalidation is absent for native SQL-queries.For HQL-queries it just CLEARS ALL CACHES if any of tables participated in query have INSERT/UPDATE/DELETE for any object.

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