v2.5.0-release-note_en.txt

The main modifications of V2.5.0-release version focus on:
1. Performance optimization
When using the extended protocol, inserting multiple pieces of data in /function is rewritten as copy, and the writing performance is improved dozens of times.
The cost estimation accuracy is improved, and the execution plan performance is improved by more than 2 times.
pg_stat_cluster_activity memory usage optimization


2. Function enhancement
Supports joining tables of different nodegroups with resource isolation
Support subscribing to DN WAL logs from CN
Support analyze information synchronization to other CNs to ensure consistent statistical information of different CNs
Increase libpq TCP timeout setting
Error message prompts have been enhanced to facilitate user analysis of problems.

3. Other known bug fixes