Monitoring Semi-Synchronous Replication Status

Check Semi-Sync Replication Status

Write a MySQL query to check if semi-synchronous replication is working.

Solution:

-- Check if semi-sync is enabled on master
SHOW GLOBAL VARIABLES LIKE 'rpl_semi_sync_master_enabled';

-- Check if semi-sync is functioning
SHOW STATUS LIKE 'Rpl_semi_sync_master_status';

-- Check number of semi-sync commits
SHOW STATUS LIKE 'Rpl_semi_sync_master_yes_tx';

Explanation:

• Purpose of the Query:
• Verifies whether semi-synchronous replication is active and functioning.
• Key Components:
• Checking variables for enablement status.
• Status variables to understand how many transactions were acknowledged semi-synchronously.
• Real-World Application:
• Ensures replication strategy is working as intended, crucial for data integrity.

Notes:

• Regular checks help in maintaining replication efficiency.

For more Practice: Solve these Related Problems:

• Write a SQL query to check if semi-synchronous replication is active across all slaves in a setup.
• Write SQL to track the performance impact of semi-synchronous replication on transaction commits.

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Previous MySQL Exercise: Configure Semi-Synchronous Replication.
Next MySQL Exercise: Convert Semi-Sync to Full Sync.