Hello Morten,
thank you very much for your help.
Picture e7: graphite-carbon 0.9.15-1, nav 4.8.2-1stretch (debian stretch) Picture jy: graphite-carbon 0.9.15-1, nav 4.8.2-2stretch (debian stretch)
We don't have any SNMP timeouts in our logs, ipdevpoll reports no errors and strangely enough this issue affects only some interfaces: *On one device we have an AE consisting of 4 interfaces and all 4 interfaces have graphs without gaps, but the AE interface consists of mostly gaps. The problems are not limited to AE interfaces though, that would be too easy. *On another device we have interfaces with 1000BASE-T (=copper) and some of them have no gaps at all while others are mostly gaps.
Best regards Karl
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ *From:* Morten Brekkevold [mailto:morten.brekkevold@uninett.no] *Sent:* Monday, Feb 19, 2018 11:36 AM CET *To:* Karl Gerhard *Cc:* nav-users@uninett.no *Subject:* Is that a healthy carbon cache?
On Fri, 16 Feb 2018 17:13:08 +0100 Karl Gerhard karl_gerh@gmx.at wrote:
Hello,
we're having problems with gaps in graphs (only for some interfaces) and I'm working through the https://nav.uninett.no/doc/4.8/faq/graph_gaps.html guide. I've arrived at the part with the "Carbon Cache" and I'd like to know whether those two graphs represent a healthy state: http://abload.de/img/e7zassl.png http://abload.de/img/jyz3sjf.png
This does not look like a cache that is being saturated, so if there's a problem, it's likely somewhere else. But, however, as you noted, it is a bit disconcerting that a negative number of cache entries are reported (which would be impossible).
Which version of carbon are you on?