Reduced System Calls in MergeTree Table Reads

Why it matters

This feature optimizes the reading performance for MergeTree tables by minimizing the overhead caused by frequent open and close system calls. Reducing these calls decreases I/O latency and improves query speed, especially on large datasets with many parts.

How to use it

This optimization is applied automatically when reading from MergeTree tables. No additional configuration or user action is required to benefit from the reduced system calls.