The one day graph *would* look fine, but I kinda like the 3-day. <div><br></div><div>The "blocky" look I'm seeing comes from RRD generating the graph using the best datasource to fit the size you're asking for. By default, the first data store contains 576 points at 5 minute intervals, which covers 2 days. The second data store contains 576 point at 30 minute intervals, which is 12 days. Each of the 30-minute data points is generated by averaging together 6 of the 5-minute data points. If you ask rrd to generate a 3 day graph, there are not enough points in the first data store, so it uses the second store and each point on the graph then covers more pixels.</div>
<div><br></div><div>It's the same effect as zooming in on a graph. To fix it, I've resized the existing RRDs to hold 864 data points, so there will be enough fine-grain data to get a decent 3-day graph. </div><div>
<br></div><div>Ralph Mitchell</div><div><br></div><div><br></div><div><br></div><div><div class="gmail_quote">2011/12/23 James Wade <span dir="ltr"><<a href="mailto:jkwade@futurefrontiers.com">jkwade@futurefrontiers.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ralph,<div><br></div><div>I just changed TrendSeconds to 8640 (1 day) and left the RRDWIDTH the same. I get a one day graph which looks fine.<span class="HOEnZb"><font color="#888888"><div>
<br></div></font></span><div><span class="HOEnZb"><font color="#888888">James<br><br></font></span><div class="gmail_quote"><div><div class="h5">On Fri, Dec 23, 2011 at 9:38 AM, Ralph Mitchell <span dir="ltr"><<a href="mailto:ralphmitchell@gmail.com" target="_blank">ralphmitchell@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div class="gmail_quote">On Thu, Dec 22, 2011 at 5:02 PM, Henrik Størner <span dir="ltr"><<a href="mailto:henrik@hswn.dk" target="_blank">henrik@hswn.dk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div>On 22-12-2011 22:56, James Wade wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I'm doing a new installation of xymon. Everything is working great, but<br>
I'm in the process of configuring and could use some assistance, so you<br>
might see a few more posts from me.<br>
<br>
Is there a way to have the graphs on each default to a different<br>
setting? As an example, when looking at cpu, instead of a two day graph<br>
have a one hour graph. Is there a global setting?<br>
</blockquote>
<br></div></div>
TRENDSECONDS in xymonserver.cfg. If you change this, then you'll probably also want to change the RRDWIDTH setting, which defines the size of the graph image.<br>
<br>
On <a href="http://www.xymon.com" target="_blank">www.xymon.com</a>, TRENDSECONDS is set to 259200 = 3 days, and RRDWIDTH is set to 864; the reasoning being that with measurements every 5 minutes there are 288 measurements per day, so 3 days = 864 measurements. Matching the RRDWIDTH setting with this means that each measurement gets 1 pixel.<br>
</blockquote><div><br></div><div><br></div><div>If I set TRENDSECONDS & RRDWIDTH, I get blocky graphs, presumably due to there not being sufficient data at the normal resolution. To fix that, I *think* I need to:</div>
<div><br></div><div>1) resize all the the rrd files with 'rrdtool resize' - wrote a script for that</div><div>2) alter server/etc/rrddefinitions.cfg to set the defaults for new rrd - done that</div><div><br></div>
<div>Did I miss anything?</div><div><br></div><div>Thanks,</div><span><font color="#888888"><div><br></div><div>Ralph Mitchell</div></font></span></div>
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</blockquote></div><br></div>