logbuffer table provides information on
NDB Cluster log buffer usage.
logbuffers table contains the following
The ID of this data node.
Type of log. One of:
The log ID; for Disk Data undo log files, this is the same as the value shown in the
LOGFILE_GROUP_NUMBERcolumn of the
INFORMATION_SCHEMA.FILEStableas well as the value shown for the
log_idcolumn of the
The log part number
Total space available for this log
Space used by this log
logbuffers table rows reflecting two
additional log types are available when performing an NDB
backup. One of these rows has the log type
BACKUP-DATA, which shows the amount of data
buffer used during backup to copy fragments to backup files. The
other row has the log type
displays the amount of log buffer used during the backup to
record changes made after the backup has started. One each of
log_type rows is shown in the
logbuffers table for each data node in the
cluster. These rows are not present unless an NDB backup is
currently being performed.