# [[metric:replication_flush_lag]]

> Distance or time between primary WAL and standby flush position.
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Distance or time between primary WAL and standby flush position.

## Referenced by wait events {#wait-events}

- [IPC/LogicalSyncData](/ipc/logical-sync-data/)
- [IPC/LogicalSyncStateChange](/ipc/logical-sync-state-change/)
- [IPC/SyncRep](/ipc/sync-rep/)
- [LWLock/SyncRep](/lwlock/sync-rep/)