It is not documented but if you want a bit more (internal & technical) details:
On 05/02/07, Peter Ondruska <email@example.com> wrote:
> in http://db.apache.org/derby/papers/logformats.html I read:
> RawStore exposes a checkpoint method which clients can call, or a
> checkpoint is taken automatically by the RawStore when:
> 1. The log file grows beyond a certain size (configurable, default 1MB)
> However I have not found a way to configure this (except changing the
> source code). Is there any undocumented property to configure this? I
> am loading huge amounts of data (GBs) and hope to gain speed using
> bigger log files (as in Oracle).
I think you can increase the size of the log files and the checkpoint
interval by setting the following properties:
The default for the first one is 1 MB, ie. a new log file is created
for every 1 MB written to the log, and a check point is done for every
10 MB of log (every 10 log files).
Hope this helps,