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    系统。指标

    包含可以立即计算或具有当前值的指标。 例如，同时处理的查询的数量或当前副本的延迟。 此表始终是最新的。

    • () — Metric name.
    • value (Int64) — Metric value.
    • description () — Metric description.

    支持的指标列表，您可以在 src/Common/CurrentMetrics.cpp ClickHouse的源文件。

    1. ┌─metric─────────────────────┬─value─┬─description──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
    2. │ Query                      │     1 │ Number of executing queries                                                                                                                                                                      │
    3. │ PartMutation               │     0 │ Number of mutations (ALTER DELETE/UPDATE)                                                                                                                                                        │
    4. │ ReplicatedFetch            │     0 │ Number of data parts being fetched from replicas                                                                                                                                                │
    5. │ ReplicatedSend             │     0 │ Number of data parts being sent to replicas                                                                                                                                                      │
    6. │ ReplicatedChecks           │     0 │ Number of data parts checking for consistency                                                                                                                                                    │
    8. │ DiskSpaceReservedForMerge  │     0 │ Disk space reserved for currently running background merges. It is slightly more than the total size of currently merging parts.                                                                     │
    9. │ DistributedSend            │     0 │ Number of connections to remote servers sending data that was INSERTed into Distributed tables. Both synchronous and asynchronous mode.                                                          │
    10. └────────────────────────────┴───────┴──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘

    另请参阅

    • — Contains periodically calculated metrics.
    • 系统。活动 — Contains a number of events that occurred.
    • — Base concepts of ClickHouse monitoring.