How can I troubleshoot replication lag in PostgreSQL?
An example of an AI chatbot conversation about troubleshooting replication lag in PostgreSQL.
I'm experiencing replication lag in my PostgreSQL database. How can I troubleshoot this issue?
First, check the replication status using the pg_stat_replication view. This will show you the current state of your replicas.
What specific metrics should I look for in pg_stat_replication?
Look for the lag in the pg_xlog_location_diff column, which indicates how far behind the replica is compared to the primary.
Are there any common causes for replication lag?
Yes, common causes include network latency, high load on the primary server, or slow queries on the replica.
How can I reduce replication lag?
You can optimize your queries, increase the resources on your replicas, or adjust the wal_level and max_wal_senders settings.
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