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zookeeper_connection

#zookeeper_connection

This table does not exist if ZooKeeper is not configured. The 'system.zookeeper_connection' table shows current connections to ZooKeeper (including auxiliary ZooKeepers). Each row shows information about one connection.

Columns:

  • name (String) — ZooKeeper cluster's name.
  • host (String) — The hostname/IP of the ZooKeeper node that ClickHouse connected to.
  • port (String) — The port of the ZooKeeper node that ClickHouse connected to.
  • index (UInt8) — The index of the ZooKeeper node that ClickHouse connected to. The index is from ZooKeeper config.
  • connected_time (DateTime) — When the connection was established
  • session_uptime_elapsed_seconds (UInt64) — Seconds elapsed since the connection was established
  • is_expired (UInt8) — Is the current connection expired.
  • keeper_api_version (String) — Keeper API version.
  • client_id (UInt64) — Session id of the connection.
  • xid (Int32) — Xid of the current session.

Example:

SELECT * FROM system.zookeeper_connection;
┌─name────┬─host──────┬─port─┬─index─┬──────connected_time─┬─session_uptime_elapsed_seconds─┬─is_expired─┬─keeper_api_version─┬─client_id─┐
│ default │ 127.0.0.1 │ 9181 │     0 │ 2023-06-15 14:36:01 │                           3058 │          0 │                  3 │         5 │
└─────────┴───────────┴──────┴───────┴─────────────────────┴────────────────────────────────┴────────────┴────────────────────┴───────────┘