Help Center/ Data Replication Service/ User Guide (Ankara Region)/ Troubleshooting/ Solutions to Failed Check Items/ Database Parameters/ Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct
Updated on 2024-04-11 GMT+08:00
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Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct

PostgreSQL Synchronization

Table 1 Checking whether the MAX_REPLICATION_SLOTS value in the source database is correct

Check Item

Whether the MAX_REPLICATION_SLOTS value in the source database is correct

Description

The max_replication_slots value of the source database must be greater than the number of used replication slots. Otherwise, the synchronization may fail.

Failure Cause and Handling Suggestion

Failure cause: The max_replication_slots value of the source database is less than or equal to the number of used replication slots.

Handling suggestion: Set max_replication_slots to a value greater than the number of used replication slots and restart the database to apply the changes. Run the following command to query the number of used replication slots in the current database:

select count(1) from pg_replication_slots;

Failure cause: Insufficient user permissions

Handling suggestion: Check whether the database user permissions meet the synchronization requirements.
Parent topic: Database Parameters