I have a very simple program that has two classes, both generate JMS messages
and both accept each others messages with onMessage() methods. If I delete all
the files that are in my data/journal directory, after startup I find that the
program by default generates 400Mgs of journal files (40 files 10Mgs each).
These seem to be defined in the jbm-configuration.xml file at about lines 85 to
94, here is the snippit :
<!-- 10 MB journal file size -->
| <journal-file-size>10485760</journal-file-size>
|
| <journal-min-files>40</journal-min-files>
|
| <!-- Maximum simultaneous asynchronous writes accepted by the native
layer.
| (parameter ignored on NIO)
| You can verify the max AIO on the OS level at
/proc/sys/fs/aio_max_nr. (aio-nr will give you the current max-aio being used)
| -->
| <journal-max-aio>5000</journal-max-aio>
|
|
| I a curious, is this really necessary (400 MGs minimum) and what is it used
for?
|
| Regards,
|
| GMarsh
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