@Rocky What improvements are there going from 4.1.4 to 4.1.6 as of now 4.1.4 and 4.1.6 both not visible in github release is there any other place i can see cahnge log

As of early October 2026, StarRocks v4.1.6 is the latest patch release in the 4.1 series. If you are not seeing these versions on the main GitHub Releases page, it is likely because they were recently tagged or are primarily hosted on the official documentation site. Key Improvements: 4.1.4 → 4.1.6 The transition from 4.1.4 to 4.1.6 includes enhancements introduced in both the 4.1.5 and 4.1.6 patch cycles. v4.1.6 (Released Sept 30, 2026) * AWS SDK Client Switch: The default HTTP client for the AWS SDK has been switched from Poco back to the SDK's native client (

enable_poco_client_for_aws_sdk

now defaults to

false

). * Memory Management: jemalloc's dedicated oversize arena is now enabled by default. This improves the reuse of large buffers and reduces memory fragmentation for BE (Backend) and CN (Compute Node) processes. * Data Integrity: Shared-data tablet metadata and transaction log files are now written with an Adler-32 checksum by default (

lake_enable_protobuf_file_checksum

). This allows for corruption detection during read operations. * Online Optimize Change: The "Online Optimize Table" feature is now opt-in. The FE configuration

enable_online_optimize_table

defaults to

false

, meaning

ALTER TABLE ... DISTRIBUTED BY ...

will block writes unless this is explicitly enabled. v4.1.5 (Released Sept 8, 2026) * External Table Stats: Added support for

ANALYZE SAMPLE TABLE PREDICATE COLUMNS

specifically for external tables. * Tablet Pre-splitting: Enhanced sample-based tablet pre-splitting to support non-key expressions, dynamic-overwrite temporary partitions, and Iceberg/overwrite loads. * Lake Table Performance: The system now streams source segments for lake column updates, significantly reducing memory usage during large updates. * Paimon Catalog Optimization: Background metadata refreshes for Paimon catalogs now only refresh recently accessed or changed tables rather than the entire catalog. Where to view the Changelog If GitHub's Release UI is lagging, the most authoritative place to view the detailed changelog is the StarRocks Documentation: * Release Notes Page: https://docs.starrocks.io/releasenotes/release-4.1/ * GitHub Tags: You can often see the code changes and commit history for these versions under the StarRocks Tags section before the formal "Release" description is finalized. Note on Downgrading: If you upgrade to v4.1, please note that you cannot downgrade to any v4.0 version earlier than v4.0.6 due to internal changes in tablet metadata layout. References • release_notes/release-2.1.md • release_notes/release-4.0.md