# DBENV->set_lg_bsize

`

###

    #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

DBENV->set_lg_bsize, DBENV->set_lg_max, log_archive, log_compare, log_file, log_flush, log_get, log_put, log_register, log_stat and log_unregister.`

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