Hey MJ, Are you running pf on Debian 7 also ? If not, what is your dhcpd version ?
This issue looks like the following isc-dhcp bug, supposed to be corrected in isc-dhcpd 4.2.1 (according to https://kb.isc.org/article/AA-00852/0/DHCP-4.2.5-Release-Notes.html) - Disable the use of kqueue in the ISC library. This avoids a problem between the fork and socket code that caused the dhcpd process to use all available cpu if the program daemonized itself. [ISC-Bugs #21911] ----- Mail original ----- > De: "mj" <[email protected]> > À: [email protected] > Envoyé: Mercredi 10 Février 2016 13:44:49 > Objet: Re: [PacketFence-users] PF 5.6.1 dhcpd CPU 100% > > I'm also seeing dhcpd high cpu usage, but at the same time I also > noticed errors on my fingerbank setup. I thought this was the cause. > > I have turned off OMAPI now as well, let's see how dhcpd behaves in a > few hours from now. > > MJ > > On 02/10/2016 11:47 AM, Frederic Hermann wrote: > > Hey guys, > > > > On our new pf 5.6.1 production server (using VLAN enforcement), we > > observed that dhcpd was running at 100% of available CPU after a > > few > > hours in production. > > > > After some investigations, it seems related to OMAPI setup : when > > we > > disable the OMAPI resolution for ip2mac and mac2ip, the problem > > does not > > appear again. > > > > We are not able to find what precise operation triggers the issue, > > as > > we can not reproduce this on our test server, even when trying to > > stress > > the dhcp server. > > > > Did anyone here already notice the same ? > > > > Regards, > > > > > > -- > > > > Frédéric Hermann > > > > > > > > > > ------------------------------------------------------------------------------ > > Site24x7 APM Insight: Get Deep Visibility into Application > > Performance > > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > > Monitor end-to-end web transactions and take corrective actions now > > Troubleshoot faster and improve end-user experience. Signup Now! > > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > > > > > > > > _______________________________________________ > > PacketFence-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/packetfence-users > > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application > Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > PacketFence-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/packetfence-users > ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ PacketFence-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/packetfence-users
