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.
Additional Links​
PostgreSQL docs - Wait Events of Type Activity
Percona Blog - Setting up Streaming Replication
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