data resource_error ai_generated true

ClickHouse: memory limit exceeded for query

ID: data/clickhouse-memory-limit

Also available as: JSON · Markdown
80%Fix Rate
84%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

ClickHouse query exceeded memory limit.

generic

Workarounds

  1. 88% success Add LIMIT and WHERE clauses to reduce data volume
  2. 90% success Use distributed query execution and increase max_memory_usage per query

Dead Ends

Common approaches that don't work:

  1. Set max_memory_usage to unlimited 82% fail

    Server OOM risk

  2. Remove all aggregations 78% fail

    Loses analytics capability