node_timeline system table is not producing any output in UC

[Soma]

node_timeline system table is not producing any output in UC.

In system tables node_timeline table is not having any data .

Do we need to enable to any other services for UC

[Kaniz]

Hi @Soma, 

The node_timeline system table in Databricks is designed to provide historical observability across your account. However, if you’re not seeing any data in the node_timeline table, there are a few considerations to keep in mind:

1. Unity Catalog-Enabled Workspace:

   • To enable and access system tables, you need to have at least one Unity Catalog-enabled workspace in your Databricks account.
   • System tables include data from all workspaces in your account but can only be accessed from a Unity...¹.

2. System Table Availability:

   • Currently, Databricks hosts system tables for various purposes, including audit logs, table lineage, billable usage, node types, and more.
   • If you’re specifically interested in the node_timeline table, ensure that it’s available for your ac...¹.

3. Audit Logs and Table Access Control (TAC):

   • The Audit logs system table includes records for all audit events across your Databricks account. You can use it to capture table queries and other relevant information.
   • Additionally, consider using Databricks Table Access Control (TAC) to audit and control access to tables. Once TAC is enabled, you can see table access logs in the DatabricksTableAccessControl log table².

4. Known Issues and Workarounds:

   • Sometimes, querying specific columns or events may not yield results directly. In such cases, consider using related system tables as a workaround.
   • For example, if you’re interested in jobs running on All-Purpose Compute clusters, explore the Audit...³.