Thanks, Mark, that's very interesting! Hopefully I can make time to read the whole paper, but after a quick skim of the LDT section, I found that the first paragraph in section 9.3 seems to explain the LDT buffer message. Hopefully that will allay concerns that Cfengine was somehow leading to an application restart by using up some Linux resource. :)
Justin -----Original Message----- From: Mark Burgess [mailto:mark.burg...@iu.hio.no] Sent: Wednesday, September 22, 2010 11:47 PM To: Justin Lloyd Cc: Help-cfengine@cfengine.org Subject: Re: cf-monitord: LDT Buffer full at 10 Justin, I found the reference to my old PhD student, if you are interested http://www.iu.hio.no/~kyrre/phd_thesis_kyrre_begnum.pdf see p141 Justin Lloyd wrote: > I’m trying to understand this message because I’ve got users asking > about it, thinking it may be causally related to some unexpected > in-house application restarts. I found Mark’s response to an earlier > question about this: > > > > https://cfengine.org/pipermail/help-cfengine/2007-July/001905.html > > > > However, that goes back to Cfengine 2 and the message still exists in > Cfengine 3. The source code (env_monitor.c) only indicates this is > something about “leap detection”, and from the code it would seem that > leap detection has something to do with detecting unusually large > changes in system observables. It does tend to show up right after > Cfengine restarts, which makes me think that it could be seeing large > changes since lots of observables would go from zero to whatever right > away as soon as cf-monitord starts gathering data. > > > > Can anyone who understands this better provide a short explanation of > this message? I see it on a lot of systems that don’t have problems, > which is the other main reason I don’t think it’s related to the > application restarts, but I’d like to be able to explain what it is to > our users that are concerned about it. > > > > Thanks, > > Justin > > > > > > *Justin C. Lloyd* > > Senior Unix Infrastructure Engineer > > *Office*: 303.684.4166 > > > Description: Description: cid:image001.gif@01CB11F3.8C8CBD70 > www.digitalglobe.com <http://www.digitalglobe.com/> > > > > This electronic communication and any attachments may contain confidential > and proprietary > information of DigitalGlobe, Inc. If you are not the intended recipient, or > an agent or employee > responsible for delivering this communication to the intended recipient, or > if you have received > this communication in error, please do not print, copy, retransmit, > disseminate or > otherwise use the information. Please indicate to the sender that you have > received this > communication in error, and delete the copy you received. DigitalGlobe > reserves the > right to monitor any electronic communication sent or received by its > employees, agents > or representatives. > > > ------------------------------------------------------------------------ > > _______________________________________________ > Help-cfengine mailing list > Help-cfengine@cfengine.org > https://cfengine.org/mailman/listinfo/help-cfengine -- Mark Burgess ------------------------------------------------- Professor of Network and System Administration Oslo University College, Norway Personal Web: http://www.iu.hio.no/~mark Office Telf : +47 22453272 ------------------------------------------------- This electronic communication and any attachments may contain confidential and proprietary information of DigitalGlobe, Inc. If you are not the intended recipient, or an agent or employee responsible for delivering this communication to the intended recipient, or if you have received this communication in error, please do not print, copy, retransmit, disseminate or otherwise use the information. Please indicate to the sender that you have received this communication in error, and delete the copy you received. DigitalGlobe reserves the right to monitor any electronic communication sent or received by its employees, agents or representatives. _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
