[IMPALA-12646] Add a new metric in CatalogD web UI metrics page for avg-process-time for dropped events

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Catalog
• Labels: catalog-2024
• Epic Link: event-processor-supportability
• Epic Color: ghx-label-9
• Assignee: Sai Hemanth Gantasala
• Reporter: Sai Hemanth Gantasala
• Created: 17/Dec/23 19:42
• Updated: 23/Apr/24 01:44

Description

Since dropped database/table events doesn't exist in cache, currently we don't show the process time for drop operation in the metrics page of web UI.

It would be great to add to new metric such as 'avg-process-time' for all the drop database/table events so that admins can monitor this metric to see if drop operations are slow.

Generally, a drop should be fast, but it takes metastoreDdlLock_, which can block on HMS RPCs. So, it would be ideal to observe this operation in the web UI.