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metric_log

包含来自表 system.metrics 和 system.events 的指标值的记录，定期刷新到磁盘。

列

  • hostname (LowCardinality(String)) — 执行查询的服务器的主机名。
  • event_date (Date) — 事件日期。
  • event_time (DateTime) — 事件时间。
  • event_time_microseconds (DateTime64) — 带有微秒级精度的事件时间。

示例

SELECT * FROM system.metric_log LIMIT 1 FORMAT Vertical;
Row 1:
──────
hostname:                                                        clickhouse.eu-central1.internal
event_date:                                                      2020-09-05
event_time:                                                      2020-09-05 16:22:33
event_time_microseconds:                                         2020-09-05 16:22:33.196807
milliseconds:                                                    196
ProfileEvent_Query:                                              0
ProfileEvent_SelectQuery:                                        0
ProfileEvent_InsertQuery:                                        0
ProfileEvent_FailedQuery:                                        0
ProfileEvent_FailedSelectQuery:                                  0
...
...
CurrentMetric_Revision:                                          54439
CurrentMetric_VersionInteger:                                    20009001
CurrentMetric_RWLockWaitingReaders:                              0
CurrentMetric_RWLockWaitingWriters:                              0
CurrentMetric_RWLockActiveReaders:                               0
CurrentMetric_RWLockActiveWriters:                               0
CurrentMetric_GlobalThread:                                      74
CurrentMetric_GlobalThreadActive:                                26
CurrentMetric_LocalThread:                                       0
CurrentMetric_LocalThreadActive:                                 0
CurrentMetric_DistributedFilesToInsert:                          0

另请参阅