Berkeley DB

DbEnv::set_lg_bsize

						#include <db_cxx.h>
						int
						DbEnv::set_lg_bsize(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. The size of the log file (see DbEnv::set_lg_max) must be at least four times the size of the the in-memory log buffer.

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 ...