COMMIT_WRITE

Property	Description
Parameter type	String
Syntax	`COMMIT_WRITE = '{IMMEDIATE \| BATCH},{WAIT \|NOWAIT}'`
Default value	If this parameter is not explicitly specified, then database commit behavior defaults to writing commit records to disk before control is returned to the client. If only `IMMEDIATE` or `BATCH` is specified, but not `WAIT` or `NOWAIT`, then `WAIT` mode is assumed. If only `WAIT` or `NOWAIT` is specified, but not `IMMEDIATE` or `BATCH`, then `IMMEDIATE` mode is assumed
Modifiable	Yes (at both session-level and system-level). Values supplied for `COMMIT_WRITE` in an `ALTER SYSTEM` or `ALTER SESSION` statement must be separated by a comma.
Range of values	Single-quoted, comma-separated list of either `IMMEDIATE` or `BATCH`, and either `WAIT` or `NOWAIT`.
Basic	No
Real Application Clusters	Each instance may have its own setting

COMMIT_WRITE is an advanced parameter used to control how redo for transaction commits is written to the redo logs. The IMMEDIATE and BATCH options control how redo is batched by Log Writer. The WAIT and NOWAIT options control when the redo for a commit is flushed to the redo logs.