B.8. System and Cluster Status

B.8. System and Cluster Status

B.8. System and Cluster Status

The following tables describe the metrics that report the status of the cluster and the individual systems within it, as well as additional metrics not covered by other categories.

Table B.15. System

Metrics	Type	Description
voltdb_clockskew_seconds	Gauge	The number of milliseconds difference between the system clock time of the current host and the remote host.
voltdb_file_descriptors_count_total	Gauge	The number of file descriptors open in the process.
voltdb_file_descriptors_limit_total	Gauge	The maximum number of file descriptors allowed for the process running the server.

Table B.16. Miscellaneous

Metrics	Type	Description
voltdb_balance_partitions_info	Metadata	Reports the status of recent rebalancing operations. Informational metric. Tags: BALANCE_MOVED_ROWS - The number of rows of data that have been moved. BALANCE_PERCENTAGE_MOVED - The percentage of the total segments that have already been moved. BALANCE_ROWS_PER_SECOND - The average number of rows moved per second. BALANCE_ESTIMATED_REMAINING - The estimated time remaining until the rebalance is complete. BALANCE_MEGABYTES_PER_SECOND - The average volume of data moved per second, measured in megabytes. BALANCE_CALLS_PER_SECOND - The average number of rebalance work units, or transactions, executed per second. BALANCE_CALLS_LATENCY - The average total time between start and finish of rebalance operations. (TODO: in millis? should be in seconds) BALANCE_CALLS_TIME - The average execution time for rebalance transactions. (TODO: in millis? should be in seconds) BALANCE_CALLS_TRANSFER_TIME - The average time spent transferring data during rebalance transactions. (TODO: in millis? should be in seconds)
voltdb_deployment_update_blocked_seconds	Histogram	Blocking times of deployment updates
voltdb_deployment_update_count_total	Counter	Count of deployment updates executed
voltdb_deployment_update_elapsed_seconds	Histogram	Execution times of deployment updates
voltdb_partition_count_total	Gauge	Number of unique partitions in the cluster (not including MP partition).
voltdb_xdcr_readiness_info	Metadata	-
voltdb_xdcr_readiness_since_timestamp_seconds	Gauge	The timestamp of the last observed XDCR readiness transition on this host. Combined with the XDCR_READINESS state this tells since when replication has been ready or broken. Reset on node restart.