#include <db_cxx.h>

int
DbEnv::set_lg_max(u_int32_t lg_max);

Description

Set the maximum size of a single file in the log, in bytes. Because DbLsn file offsets are unsigned 4-byte values, the set value may not be larger than the maximum unsigned 4-byte value. By default, or if the value is set to 0, a size of 10MB is used.

See Log File Limits for more information.

The DbEnv::set_lg_max interface may only be used to configure Berkeley DB before the DbEnv::open interface is called.

The DbEnv::set_lg_max 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.

The database environment's log file size may also be set using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_lg_max", 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.

Errors

EINVAL

An invalid flag value or parameter was specified.

Called after DbEnv::open was called.

The specified log file size was too large.

Class

See Also