[ASTERIXDB-3439] Expose disk caching metrics

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.9.10
• Fix Version/s: 0.9.10
• Component/s: STO - Storage
• Labels: triaged
• Epic Link: Columnar Format
• Assignee: Ritik Raj
• Reporter: Ritik Raj
• Created: 19/Jun/24 17:21
• Updated: 21/Jun/24 17:06

Description

The 'selective' caching policy collects metrics such as local read count (disk cache hit) cloud read count (disk cache miss). Those metrics should be exposed to improve the observability of the system.