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serxa 2023-04-06 22:54:00 +00:00
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docs/en/operations/system-tables/replicas.md
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@ -50,6 +50,7 @@ last_queue_update: 2021-10-12 14:50:08
absolute_delay: 99
total_replicas: 5
active_replicas: 5
lost_part_count: 0
last_queue_update_exception:
zookeeper_exception:
replica_is_active: {'r1':1,'r2':1}
@ -90,6 +91,7 @@ The next 4 columns have a non-zero value only where there is an active session w
- `absolute_delay` (`UInt64`) - How big lag in seconds the current replica has.
- `total_replicas` (`UInt8`) - The total number of known replicas of this table.
- `active_replicas` (`UInt8`) - The number of replicas of this table that have a session in ClickHouse Keeper (i.e., the number of functioning replicas).
- `lost_part_count` (`UInt64`) - The number of data parts lost in the table by all replicas in total since table creation. Value is persisted in ClickHouse Keeper and can only increase.
- `last_queue_update_exception` (`String`) - When the queue contains broken entries. Especially important when ClickHouse breaks backward compatibility between versions and log entries written by newer versions aren't parseable by old versions.
- `zookeeper_exception` (`String`) - The last exception message, got if the error happened when fetching the info from ClickHouse Keeper.
- `replica_is_active` ([Map(String, UInt8)](../../sql-reference/data-types/map.md)) — Map between replica name and is replica active.