Library Version 18.1.40

DbEnv::log_flush()
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## DbEnv::log_flush()

    #include <db_cxx.h>

    int
    DbEnv::log_flush(const DbLsn *lsn);

The `DbEnv::log_flush()` method writes log records to disk.

The `DbEnv::log_flush()` method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

### Parameters

#### lsn

All log records with DbLsn values less than or equal to the lsn parameter are written to disk. If lsn is NULL, all records in the log are flushed.

### Errors

The `DbEnv::log_flush()` method may fail and throw a DbException exception, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

#### EINVAL

An invalid flag value or parameter was specified.

### Class

DbEnv, DbLogc, DbLsn

### See Also

Logging Subsystem and Related Methods

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