MOLT Fetch Metrics - CockroachDB

This page lists the MOLT Fetch metrics that you can use to observe the progress of a MOLT Fetch command execution.

Metrics

By default, MOLT Fetch exports Prometheus metrics at 127.0.0.1:3030/metrics. You can configure this endpoint with the --metrics-listen-addr flag. Cockroach Labs recommends monitoring the following metrics:

Metric Name	Description
`molt_fetch_num_tables`	Number of tables that will be moved from the source.
`molt_fetch_num_task_errors`	Number of errors encountered by the fetch task.
`molt_fetch_overall_duration`	Duration (in seconds) of the fetch task.
`molt_fetch_rows_exported`	Number of rows that have been exported from a table. For example: `molt_fetch_rows_exported{table="public.users"}`
`molt_fetch_rows_imported`	Number of rows that have been imported from a table. For example: `molt_fetch_rows_imported{table="public.users"}`
`molt_fetch_table_export_duration_ms`	Duration (in milliseconds) of a table’s export. For example: `molt_fetch_table_export_duration_ms{table="public.users"}`
`molt_fetch_table_import_duration_ms`	Duration (in milliseconds) of a table’s import. For example: `molt_fetch_table_import_duration_ms{table="public.users"}`

To visualize the preceding metrics, use the Grafana dashboard bundled with your binary (grafana_dashboard.json). The bundled dashboard matches your binary version. Alternatively, you can download the latest dashboard.

See also