import com.sleepycat.db.*;

public DbLogStat log_stat(int flags)
    throws DbException;

Description

The DbEnv.log_stat method returns the logging subsystem statistics.

The flags value must be set to 0 or the following value:

Db.DB_STAT_CLEAR

Reset statistics after returning their values.

The DbEnv.log_stat method creates a DbLogStat object encapsulating the log region statistics. The following data fields are available from the DbLogStat object:

public int st_magic;

The magic number that identifies a file as a log file.

public int st_version;

The version of the log file type.

public int st_mode;

The mode of any created log files.

public int st_lg_bsize;

The in-memory log record cache size.

public int st_lg_size;

The current log file size.

public int st_w_mbytes;

The number of megabytes written to this log.

public int st_w_bytes;

The number of bytes over and above st_w_mbytes written to this log.

public int st_wc_mbytes;

The number of megabytes written to this log since the last checkpoint.

public int st_wc_bytes;

The number of bytes over and above st_wc_mbytes written to this log since the last checkpoint.

public int st_wcount;

The number of times the log has been written to disk.

public int st_wcount_fill;

The number of times the log has been written to disk because the in-memory log record cache filled up.

public int st_scount;

The number of times the log has been flushed to disk.

public int st_cur_file;

The current log file number.

public int st_cur_offset;

The byte offset in the current log file.

public int st_disk_file;

The log file number of the last record known to be on disk.

public int st_disk_offset;

The byte offset of the last record known to be on disk.

public int st_cur_offset;

The byte offset of the last record known to be on disk.

public int st_maxcommitperflush;

The maximum number of commits contained in a single log flush.

public int st_mincommitperflush;

The minimum number of commits contained in a single log flush that contained a commit.]

public int st_regsize;

The size of the region.

public int st_region_wait;

The number of times that a thread of control was forced to wait before obtaining the region lock.

public int st_region_nowait;

The number of times that a thread of control was able to obtain the region lock without waiting.

The DbEnv.log_stat method throws an exception that encapsulates a non-zero error value on failure.

Errors

The DbEnv.log_stat 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.log_stat method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

See Also