Skip to main content
Version: 4.1 Preview

Metrics t through z

tablet_base_max_compaction_score​

  • Unit: -
  • Description: Highest base compaction score of tablets in this BE.

tablet_cumulative_max_compaction_score​

  • Unit: -
  • Description: Highest cumulative compaction score of tablets in this BE.

tablet_metadata_mem_bytes​

  • Unit: Bytes
  • Description: Memory used by tablet metadata.

tablet_schema_mem_bytes​

  • Unit: Bytes
  • Description: Memory used by tablet schema.

tablet_update_max_compaction_score​

  • Unit: -
  • Description: Highest compaction score of tablets in Primary Key tables in the current BE.

threadpool_task_exception_total​

  • Unit: Count
  • Description: Cumulative number of task exceptions caught and swallowed by ThreadPool worker threads across the BE process. Increments only when enable_threadpool_catch_task_exception is true. When that item is false (default), this metric stays unchanged because there is no enclosing catch clause. Use it to alert on swallowed failures while catch mode is enabled; pool name and exception detail remain in the BE ERROR logs.

thrift_connections_total​

  • Unit: Count
  • Description: Total number of thrift connections (including finished connections).

thrift_current_connections (Deprecated)​

thrift_opened_clients​

  • Unit: Count
  • Description: Number of currently opened thrift clients.

thrift_server_acceptor_stall_ms​

  • Unit: ms
  • Type: Instantaneous
  • Description: Milliseconds since the FE Thrift accept loop last returned a connection. A wedged acceptor makes this climb, but so does an FE with no Thrift traffic, so read it together with the connection arrival rate rather than alerting on it alone. 0 also covers the case where no acceptor is running at all, before the Thrift server starts and after it stops, so a threshold alert on this metric cannot tell a dead Thrift service from a healthy one.

thrift_server_expired_connections_total​

  • Unit: Count
  • Type: Cumulative
  • Description: Total number of connections that the FE Thrift server closed without serving because they had waited in the pending queue longer than thrift_server_queue_timeout_ms. That check is disabled by default, so this counter stays at 0 until an operator arms the timeout. A rising value means the FE was working through a backlog of connections whose callers had almost certainly given up already; read it together with thrift_server_queue_wait_ms to see how far behind the queue had fallen.

thrift_server_queue_wait_ms​

  • Unit: ms
  • Type: Instantaneous
  • Description: Quantiles of how long connections waited in the FE Thrift server pending queue before a worker thread picked them up. Sampled for every dequeued connection, including the ones then dropped as expired, so the distribution is not truncated at thrift_server_queue_timeout_ms. This is the leading indicator of Thrift saturation: it climbs while the worker pool is still keeping up, well before thrift_server_rejected_connections_total starts to move.

thrift_server_rejected_connections_total​

  • Unit: Count
  • Type: Cumulative
  • Description: Total number of connections the FE Thrift server closed immediately because its worker pool was saturated. Every rejection is counted, including those whose log warning was suppressed by rate limiting. A rising value means clients are being turned away; read it with the thread_pool metrics for thrift-server-pool, where the rate of increase indicates how far worker capacity is short.

thrift_used_clients​

  • Unit: Count
  • Description: Number of thrift clients in use currently.

total_column_pool_bytes (Deprecated)​

transaction_streaming_load_bytes​

  • Unit: Bytes
  • Description: Total loading bytes of transaction load.

transaction_streaming_load_current_processing​

  • Unit: Count
  • Description: Number of currently running transactional Stream Load tasks.

transaction_streaming_load_duration_ms​

  • Unit: ms
  • Description: Total time spent on Stream Load transaction Interface.

transaction_streaming_load_requests_total​

  • Unit: Count
  • Description: Total number of transaction load requests.

txn_request​

  • Unit: -
  • Description: Transaction requests of BEGIN, COMMIT, ROLLBACK, and EXEC.

uint8_column_pool_bytes​

  • Unit: Bytes
  • Description: Bytes used by the UINT8 column pool.

unused_rowsets_count​

  • Unit: Count
  • Description: Total number of unused rowsets. Please note that these rowsets will be reclaimed later.

update_apply_queue_count​

  • Unit: Count
  • Description: Queued task count in the Primary Key table transaction APPLY thread pool.

update_compaction_duration_us​

  • Unit: us
  • Description: Total time spent on Primary Key table compactions.

update_compaction_outputs_bytes_total​

  • Unit: Bytes
  • Description: Total bytes written by Primary Key table compactions.

update_compaction_outputs_total​

  • Unit: Count
  • Description: Total number of Primary Key table compactions.

update_compaction_task_byte_per_second​

  • Unit: Bytes/s
  • Description: Estimated rate of Primary Key table compactions.

update_compaction_task_cost_time_ns​

  • Unit: ns
  • Description: Total time spent on the Primary Key table compactions.

update_del_vector_bytes_total​

  • Unit: Bytes
  • Description: Total memory used for caching DELETE vectors in Primary Key tables.

update_del_vector_deletes_new​

  • Unit: Count
  • Description: Total number of newly generated DELETE vectors used in Primary Key tables.

update_del_vector_deletes_total (Deprecated)​

update_del_vector_dels_num (Deprecated)​

update_del_vector_num​

  • Unit: Count
  • Description: Number of the DELETE vector cache items in Primary Key tables.

update_mem_bytes​

  • Unit: Bytes
  • Description: Memory used by Primary Key table APPLY tasks and Primary Key index.

update_primary_index_bytes_total​

  • Unit: Bytes
  • Description: Total memory cost of the Primary Key index.

update_primary_index_num​

  • Unit: Count
  • Description: Number of Primary Key indexes cached in memory.

update_rowset_commit_apply_duration_us​

  • Unit: us
  • Description: Total time spent on Primary Key table APPLY tasks.

update_rowset_commit_apply_total​

  • Unit: Count
  • Description: Total number of COMMIT and APPLY for Primary Key tables.

update_rowset_commit_request_failed​

  • Unit: Count
  • Description: Total number of failed rowset COMMIT requests in Primary Key tables.

update_rowset_commit_request_total​

  • Unit: Count
  • Description: Total number of rowset COMMIT requests in Primary Key tables.

wait_base_compaction_task_num​

  • Unit: Count
  • Description: Number of base compaction tasks waiting for execution.

wait_cumulative_compaction_task_num​

  • Unit: Count
  • Description: Number of cumulative compaction tasks waiting for execution.

writable_blocks_total (Deprecated)​