Library Version 18.1.40

DB_ENV->set_lg_regionmax()
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## DB_ENV->set_lg_regionmax()

    #include <db.h>

    int
    DB_ENV->set_lg_regionmax(DB_ENV *dbenv, u_int32_t lg_regionmax);

Set the size of the underlying logging area of the Berkeley DB environment, in bytes. By default, or if the value is set to 0, the minimum region size is used, approximately 128KB. The log region is used to store filenames, and so may need to be increased in size if a large number of files will be opened and registered with the specified Berkeley DB environment's log manager.

The database environment's log region size may also be configured using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_lg_regionmax", one or more whitespace characters, and the size in bytes. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

The `DB_ENV->set_lg_regionmax()` method configures a database environment, not only operations performed using the specified DB_ENV handle.

The `DB_ENV->set_lg_regionmax()` method may not be called after the DB_ENV->open() method is called. If the database environment already exists when DB_ENV->open() is called, the information specified to `DB_ENV->set_lg_regionmax()` will be ignored.

The `DB_ENV->set_lg_regionmax()` method returns a non-zero error value on failure and 0 on success.

### Parameters

#### lg_regionmax

The lg_regionmax parameter is the size of the logging area in the Berkeley DB environment, in bytes.

### Errors

The `DB_ENV->set_lg_regionmax()` method may fail and return one of the following non-zero errors:

#### EINVAL

If the method was called after DB_ENV->open() was called; or if an invalid flag value or parameter was specified.

### Class

DB_ENV, DB_LOGC, DB_LSN

### See Also

Logging Subsystem and Related Methods

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