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WalReceiverWaitStart

Short Description

Waiting for startup process to send initial data for streaming replication.

Additional Information

The WalSender process is seen in systems where replication is enabled. The sender process takes the WAL transactions and send them so the replica where the WalReceiver process write the transactions to WAL segments.

How to reduce this wait

This is an idle wait and is normal to see.

PostgreSQL docs - Wait Events of Type Activity

Percona Blog - Setting up Streaming Replication

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