DbEnv.set_lg_bsize
DbEnv.set_lg_bsize |
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import com.sleepycat.db.*;public void set_lg_bsize(int lg_bsize) throws DbException;
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 be used only to configure Berkeley DB before the DbEnv.open interface is called.
The DbEnv.set_lg_bsize method throws an exception that encapsulates a non-zero error value on failure.
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.
The DbEnv.set_lg_bsize method may fail and throw an exception encapsulating a non-zero error for the following conditions:
Called after DbEnv.open was called.
The size of the log file is less than four times the size of the in-memory log buffer.
The DbEnv.set_lg_bsize method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv.set_lg_bsize method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.
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Copyright Sleepycat Software
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The DbEnv.set_lg_bsize method configures a database environment, not only operations performed using the specified DbEnv handle.
The DbEnv.set_lg_bsize interface may not be called after the DbEnv.open interface is called. If the database environment already exists when DbEnv.open is called, the information specified to DbEnv.set_lg_bsize will be ignored. d56 3 a58 3 If a catastrophic error has occurred, the DbEnv.set_lg_bsize method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way. d60 1 a60 1 DbEnv, DbLogc, DbLsn d62 16 a77 1 Logging Subsystem and Related Methods @ 1.1.1.4 log @Import: RPM 4.1 @ text @d1 2 a2 2 d4 1 d38 7 a44 2
The DbEnv.set_lg_bsize interface may be used only to configure Berkeley DB before the DbEnv.open interface is called. d62 3 a64 3 If a catastrophic error has occurred, the DbEnv.set_lg_bsize method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way. d66 1 a66 1 DbEnv d68 1 a68 16 DbEnv.set_lg_bsize, DbEnv.set_lg_dir, DbEnv.set_lg_max, DbEnv.set_lg_regionmax, DbEnv.log_archive, DbEnv.log_compare, DbEnv.log_cursor, DbEnv.log_file, DbEnv.log_flush, DbEnv.log_put, DbEnv.log_register, DbEnv.log_stat, DbEnv.log_unregister, DbLogc.logc_close and DbLogc.logc_get. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d37 2 a38 7
The DbEnv.set_lg_bsize method configures a database environment, not only operations performed using the specified DbEnv handle.
The DbEnv.set_lg_bsize interface may not be called after the DbEnv.open interface is called. If the database environment already exists when DbEnv.open is called, the information specified to DbEnv.set_lg_bsize will be ignored. d56 3 a58 3 If a catastrophic error has occurred, the DbEnv.set_lg_bsize method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way. d60 1 a60 1 DbEnv, DbLogc, DbLsn d62 16 a77 1 Logging Subsystem and Related Methods @