#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 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. Configuration in the DB_CONFIG file silently overrules configuration done using the DBENV->set_lg_bsize function.

Errors

EINVAL

An invalid flag value or parameter was specified.

Called after DBENV->open was called.

See Also