#include <db.h>

int
DBENV->set_lg_bsize(DB_ENV *dbenv, u_int32_t lg_bsize);

Description

Set the size of the in-memory log buffer, in bytes. By default, or if the value is set to 0, a size of 32K is used.

Log information is stored in-memory until the storage space fills up or transaction commit forces the information to be flushed to stable storage. In the presence of long-running transactions or transactions producing large amounts of data, larger buffer sizes can increase throughput.

The DBENV->set_lg_bsize interface may only be used to configure Berkeley DB before the DBENV->open interface is called.

The DBENV->set_lg_bsize function returns a non-zero error value on failure and 0 on success.

The database environment's log buffer 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_bsize", 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.

See Also