prefer_fetch_merged_part_size_threshold
If the sum of the size of parts exceeds this threshold and the time since a replication log entry creation is greater thanprefer_fetch_merged_part_time_threshold, then prefer fetching merged part
from a replica instead of doing merge locally. This is to speed up very long
merges.
Possible values:
- Any positive integer.
prefer_fetch_merged_part_time_threshold
If the time passed since a replication log (ClickHouse Keeper or ZooKeeper) entry creation exceeds this threshold, and the sum of the size of parts is greater thanprefer_fetch_merged_part_size_threshold, then prefer fetching
merged part from a replica instead of doing merge locally. This is to speed
up very long merges.
Possible values:
- Any positive integer.