FrankYang0529 commented on code in PR #22527: URL: https://github.com/apache/kafka/pull/22527#discussion_r3387955321
########## docs/getting-started/upgrade.md: ########## @@ -35,6 +35,7 @@ type: docs * The `ClientQuotaCallback#updateClusterMetadata` method is deprecated and will be removed in Kafka 5.0. Custom implementations of `ClientQuotaCallback` no longer need to override this method, as a default no-op implementation is now provided. For further details, please refer to [KIP-1200](https://cwiki.apache.org/confluence/x/axBJFg). * The in-memory keystores (used for PEM certificates) now use the default type provided by `KeyStore.getDefaultType()` instead of the hardcoded PKCS12 type. * Storage directories formatted by the `kafka-storage` tool are no longer forward-compatible. A Kafka broker must be the same version as, or newer than, the `kafka-storage` tool that formatted its directory, regardless of the `--release-version` chosen at format time. For further details, please refer to [KIP-1170](https://cwiki.apache.org/confluence/x/ZYoEFQ). + * The Linux I/O metrics collector now exposes all 7 fields from /proc/self/io via JMX, adding rchar, wchar, syscr, syscw, and cancelled_write_bytes alongside the existing linux-disk-read-bytes and linux-disk-write-bytes. These additional metrics let operators calculate page-cache hit ratios, detect write amplification from filesystem overhead, identify inefficient syscall patterns, and monitor log-compaction I/O activity. For further details, please refer to [KIP-1291](https://cwiki.apache.org/confluence/x/co48G). Review Comment: How about using full name for new metrics? Like `linux-disk-xxx`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
