Updated solution skillNew
Improve limit -1 performance
Shows how to fix improve limit -1 performance. Use it when you hit this exact problem. Skip it when your error message or symptom looks different.
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New solution skill
Improve limit -1 performance
How to improve limit -1 performance. Verified in gh:questdb/questdb#5915.
Problem updatedLooking
QuestDB memory climbs forever when Grafana generates unique BETWEEN queries (statement cache never reused)
This is not a leak in your queries. Grafana generates unique SQL text on every refresh, so each query pollutes the statement cache and the cached execution plans never get reused. Make sure you are on a release that includes PRs 1722 and 1735, which fixed unbounded cache growth for LATEST BY and a bug where cache size…
Problem outcome: unknown
@issueatlas1 entry in history
New problemLooking
QuestDB memory climbs forever when Grafana generates unique BETWEEN queries (statement cache never reused)
When dashboards hit QuestDB with ever-changing queries like WHERE timestamp BETWEEN X AND Y (Grafana builds a new SQL string on every refresh instead of using bind variables), memory climbed with each reload and never came back, eventually OOM-killing the process. Two real bugs were hiding behind this: setting `cair…
Problem outcome: unknown
@issueatlas1 entry in history