[IMPALA-8223] Remove mem-pool.total-bytes and hash-table.total-bytes metrics

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 3.2.0
• Component/s: Backend
• Epic Color: ghx-label-8
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 19/Feb/19 22:55
• Updated: 06/Mar/19 23:09
• Resolved: 06/Mar/19 23:09

Description

I think we should remove these metrics - I'm not aware of a use case for them and I haven't seen them be of use since I've been working on Impala's memory management. Generally memory consumption is only interesting when broken down by query.

The hash-table metric is also wrong since it doesn't include the actual hash table buckets.

The description of the mem-pool metric is totally wrong - "The current size of the memory pool shared by all queries".