Date: Tue, 30 Jun 2015 16:29:51 +0700 From: Olivier Nicole <Olivier.Nicole@cs.ait.ac.th> To: Ben Woods <woodsb02@gmail.com> Cc: questions@freebsd.org Subject: Re: kern.ipc.nmbclusters limit reached Message-ID: <wu7ioa51r3k.fsf@banyan.cs.ait.ac.th> In-Reply-To: <CAOc73CCz0T6rtsiXBGseBWXs6ShFjQ6BifkqDbtORfQEEcHrHg@mail.gmail.com> (message from Ben Woods on Tue, 30 Jun 2015 17:22:28 %2B0800)
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Thank you Ben, >> Since I updated my amanda server to 10.1, I cannot complete a back-up, >> the system will freeze in the middle of the dumps with bunches of error: >> >> Jun 30 09:37:16 amanda kernel: [zone: mbuf_cluster] kern.ipc.nmbclusters >> limit reached >> >> >> The kernel is: >> >> FreeBSD amanda.cs.ait.ac.th 10.1-RELEASE-p9 FreeBSD 10.1-RELEASE-p9 #0 >> r282829: Wed May 13 14:31:30 ICT 2015 root@amanda.cs.ait.ac.th:/usr/obj/usr/src/sys/GENERIC >> amd64 >> >> and >> >> sysctl kern.ipc.nmbclusters >> kern.ipc.nmbclusters: 253064 >> >> This ipc.nmbcluster seems terribly high (like 0.5 GB memory), but that's >> the value set by the kernel by default! >> >> Something must be wrong there, but I don't know ehre to look. >> >> Thanks in advance for the help, >> >> olivier >> -- >> > > I guess you are using Intel igb(4) or em(4) network interface cards? No, that MB uses nfe(4). > This is a known issue, and the work around proposed by the pfsense project > is to manually increased the nmbcluster limit: > > Add the following to /boot/loader.conf: > > kern.ipc.nmbclusters="1000000" But I will try that anyway. My concern is that 2048 Bytes per nmbcluster, makes it 2,048,000,000 two giga bytes of memory? Best regards, Olivier > > > > https://doc.pfsense.org/index.php/Tuning_and_Troubleshooting_Network_Cards#Intel_igb.284.29_and_em.284.29_Cards > > Regards, > Ben --
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