Additional Journal Store Properties
This appendix describes additional journal store properties. These advanced properties can be used to resolve performance issues or functional differences between platforms.
-
jeus.store.journal.control-file-name
Description
Save a control file under a different name. This attribute is only used under special circumstances.
Default
control.dat
-
jeus.store.journal.log-file-mode
Description
File mode used to open a log file. Set one of "rw", "rws", and "rwd". If set to "rw", file force is forcibly executed.
Default
rwd
-
jeus.store.journal.max-move-count
Description
If a log file becomes full, an overflow processing executes to secure the required space. During the overflow processing, the records that have not been used for a long time will be moved to a secondary storage to prevent performance degradation. This property is used to set the allowed maximum number of times the surplus records can be moved.
Default
1
-
jeus.store.journal.overflow-factor
Description
If the current log file’s unused space ratio is the same or less than the specified rate, overflow is checked.
Default
0.5
-
jeus.store.journal.min-buffer-size
Description
Minimum buffer size for writing records in batch.
Default
4 KB
-
jeus.store.journal.max-buffer-size
Description
Largest buffer size for writing records in batch.
Default
4 MB
-
jeus.store.journal.use-direct-buffer
Description
Option to use DirectByteBuffer when writing through the FileChannel.
Default
false
-
jeus.store.journal.max-waiting-thread-count
Description
Maximum number of threads that are waiting to use the buffer.
Default
32