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strange graph behavior - random machines & graphs

list Ralph Mitchell
Fri, 30 Nov 2007 11:18:45 -0600
Message-Id: <user-100a7b70c7ab@xymon.invalid>

On Nov 30, 2007 10:55 AM, Gary Baluha <user-ae3e15c22de1@xymon.invalid> wrote:
Hmm, this is getting curiouser and curiouser.  Apparently at least _some_
of the graphs that appear corrupted still have some valid data.  If I use
the graph zoom feature (clicking on the magnifying glass) and select certain
portions of the graph, the graph data shows up as normal.  It appears that
the problem is related to periodic data artifacts (the huge numbers) that
cause the scale of the graph to resize to show it within bounds, and this
causes the valid data to essentially disappear.

I realized this when I looked at the graph, and saw that the (curr) and
(min) data points were showing normal values.  It's just the (max) and (avg)
values that are way off, which causes the rest of the graph to be incorrect.

Have you tried running hobbitd_rrd with the "--debug" option??  Add it to
the various hobbitd_rrd entries in server/etc/hobbitlaunch.cfg.  I haven't
tried it myself, so I don't know how verbose it gets.  I seem to recall
Henrik saying it's OK to just kill hobbitd_rrd processes because they get
respawned.

I guess the debug output shows up in the rrd-status.log in your Hobbit logs
directory.  Is there anything interesting in that log already??  Or any
other log??

Ralph Mitchell