shiroonigami23-ui opened a new pull request, #4756:
URL: https://github.com/apache/cassandra/pull/4756
## What is this
Implements a table-level histogram for write request size in rows.
## JIRA
- CASSANDRA-21320
## Changes
- Added `RowsMutatedPerWriteHistogram` to `TableMetrics`.
- Added matching keyspace histogram `RowsMutatedPerWriteHistogram` in
`KeyspaceMetrics`.
- Updated write request metric recording to update this histogram once per
write request per table.
- For multi-mutation requests (e.g., batches), rows are aggregated per
table and recorded once.
- For single `PartitionUpdate`, one histogram update is recorded for that
request.
- Extended `ClientRequestRowAndColumnMetricsTest` with assertions for the
new table histogram.
## Testing
- Unable to run unit tests in this environment because `ant` is not
installed (`ant: command not found` on Windows shell).
- Verified changed call paths and metric wiring via code inspection and diff
checks.
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