Add SamplingLogger utility for reducing log volume while maintaining observability
- Dominant language
- Java
- Stars
- 6.2k
- Forks
- 2.5k
- Avg merge
- 2d 8h
- Merged PRs (30d)
- 111
Description
### Task Description
**What needs to be done:**
Add a SamplingLogger utility class that logs at INFO level once every N times, otherwise at DEBUG level. Apply it to high-frequency log statements in AbstractTableFileSystemView:
- "Building file system view for partition(s)" - DEBUG for metadata tables, INFO every 10th time for data tables
- "Took X ms to read Y instants, Z replaced file groups" - INFO every 5th time
**Why this task is needed:**
In high-throughput scenarios with many partitions, these log statements generate excessive volume at INFO level, making it difficult to identify important events and increasing log storage costs. Sampling maintains periodic visibility for monitoring while reducing log volume by 80-90%.
### Task Type
Code improvement/refactoring
### Related Issues
**Parent feature issue:** (if applicable )
**Related issues:**
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Contributor guide
No contributing guide indexed for this repository
Research direction
Locate AbstractTableFileSystemView and identify the two high-frequency log statements described in the issue. Then find the appropriate location for a SamplingLogger utility and inspect nearby logging conventions. Done means the specified messages use the requested INFO/DEBUG sampling rates while preserving periodic visibility; no test file is named in the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- backend, observability-sre
- Issue type
- Refactor
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100