[systemd-devel] journal like cyclic buffer?

[Warpme]

Hi *

Is there possibility to configure systemd journal to behave like cyclic 
buffer with given buffer size?
Currently I see only rotation mechanism. Issue with rotation is that 
just after rotation, journal is almost empty and user don't have access 
to old log data.
I have already many situations where interesting me log entries were 
unavailable (via journalctl) due rotated journal files.
Thx in advance!