DbEnv::set_lg_bsize
DbEnv::set_lg_bsize |
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#include <db_cxx.h>int DbEnv::set_lg_bsize(u_int32_t lg_bsize);
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 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 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.
Called after DbEnv::open was called.
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