In <4AF006C5.1000907 at shihad.org> Iain M Conochie <iain at shihad.org> writes:
Henrik St�rner wrote:
<snip>
The standard 4.3.0 beta adds caching of RRD file updates, and this has a significant impact on the I/O load of the server - essentially, it means that hobbitd_rrd caches up to 12 updates (= 1 hour) before it does an actual update of the RRD file. Since the amount of disk I/O is almost identical whether you're doing one data update or 50, this caching eliminates about 90% of your disk I/O on the RRD files. So that would be the simplest solution to implement.
I am running 4.3.0-0.20080103 so quite an out of date version. However I would be interested in learning this. Would I have to upgrade my hobbit / xymon installation to get this feature? What version contains it? How do I enable it?
I would really recommend upgrading to the current software in the Subversion tree http://hobbitmon.svn.sourceforge.net/viewvc/hobbitmon/branches/4.3.0/ and just install that.
You could probably get away with just copying the hobbitd/hobbitd_rrd and web/hobbitsvc.cgi binaries from this version on top of your current setup, but I cannot say for certain that it will work.
Regards, Henrik