On May 13, 2008, at 9:20 AM, JonathanC wrote:
After months of testing, I have finally decided to build a zenoss
server and work it into production (moving from nagios/cacti)...As I
have continued to load my devices into the system, I am now getting
gaps in my graphs. The breaks occur at random times and are on all
the hosts (about 40). Being a relatively new user, I'm not sure
what to look for. I am running this on a brand new dell server with
2 GB of memory, and a quad core processor. I am running the most up
to date version of zenoss (2.1.3). I really love this product and
would love to roll it out...If anyone could point me in the right
direction, it would be most appreciated.
Gaps in the graphs can be a lot of things. The first place to look
would be in $ZENHOME/log/zenperfsnmp.log. The important lines to look
for are the following. They tell you how many data points are being
collected, how many devices are being collected and how long it took.
The time should never approach 300 seconds or you'll be in danger of
overrunning the collection cycle and getting gaps in your graphs.
2008-05-13 04:08:52 INFO zen.zenperfsnmp: sent 1281 OID requests
2008-05-13 04:08:52 INFO zen.zenperfsnmp: collected 49 of 52 devices
in 10.49
Another common cause for gaps would be a wandering clock. Make sure
you use ntp to a reliable time source to keep your clock accurate.
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