A ClickHouse® 25.8 Detective Story: High Memory Usage and How to Fix It
Altinity’s long-term testing of ClickHouse 25.8 revealed surprising OOM errors on idle clusters. Learn what caused them and how to prevent similar issues.

Altinity’s long-term testing of ClickHouse 25.8 revealed surprising OOM errors on idle clusters. Learn what caused them and how to prevent similar issues.
Some ClickHouse versions contain a bug that adds a trailing null to aggregates on string values. The bug is now fixed and upgrades are available.
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