The IQ server will automatically perform a blocking (foreground) merge
when necessary.
Certain actions require an automatic blocking merge before the action can commence:
- Accessing a table at table-level snapshot isolation (rather than
row-level snapshot isolation)
- RLV DML approaching RLV memory limit
- Using DDL commands such as CREATE or ALTER
Commands which require an immediate automatic blocking merge may experience a pause
while the merge is executed, before the command proceeds.