Date: Mon, 14 Oct 2013 18:35:49 +0200 From: Carlos Jacobo Puga Medina <cjpugmed@gmail.com> To: freebsd-questions@freebsd.org Subject: Tuning /etc/sysctl.conf Message-ID: <CAHHLbRMzNtGWAg1DGh405d5BVzORMDE-qC9qts%2BxzbUmAWtgew@mail.gmail.com>
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Hi people, I'm very interested to tuning /etc/sysctl.conf according to the specifications of my PC. I've been reading some guides [1], tutorials [2-3], Q&A [4] and the FreeBSD Handbook's related section 12.12 Tuning with sysctl(8), but I think it's much more convenient if I contrast it with other examples or experienced users. Here is my relevant info outputs for help to improve the sysctl(8) variables. % uname -a FreeBSD freebsd 9.2-RELEASE FreeBSD 9.2-RELEASE #0 r255898: Fri Sep 27 03:52:52 UTC 2013 root@bake.isc.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386 % dmesg | grep CPU CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2394.06-MHz 686-class CPU) cpu0: <ACPI CPU> on acpi0 p4tcc0: <CPU Frequency Thermal Control> on cpu0 % dmesg | grep memory real memory = 2147483648 (2048 MB) avail memory = 2082701312 (1986 MB) % pciconf -lvv | grep -n2 Ethernet 41-sis0@pci0:0:4:0: class=0x020000 card=0x80a71043 chip=0x09001039 rev=0x91 hdr=0x00 42- vendor = 'Silicon Integrated Systems [SiS]' 43: device = 'SiS900 PCI Fast Ethernet' 44- class = network 45- subclass = ethernet My /etc/sysctl.conf # $FreeBSD: release/9.2.0/etc/sysctl.conf 112200 2003-03-13 18:43:50Z mux $ # # This file is read when going to multi-user and its contents piped thru # ``sysctl'' to adjust kernel values. ``man 5 sysctl.conf'' for details. # # Uncomment this to prevent users from seeing information about processes that # are being run under another UID. #security.bsd.see_other_uids=0 vfs.usermount=1 hw.snd.default_unit=2 kern.ipc.maxsockbuf=16777216 kern.ipc.nmbclusters=32768 kern.ipc.shm_allow_removed=1 kern.ipc.somaxconn=8192 kern.maxfiles=65536 kern.maxfilesperproc=32768 net.inet.tcp.blackhole=2 net.inet.tcp.delayed_ack=0 net.inet.tcp.path_mtu_discovery=0 net.inet.tcp.recvbuf_auto=1 net.inet.tcp.recvbuf_inc=16384 net.inet.tcp.recvbuf_max=16777216 net.inet.tcp.recvspace=65536 net.inet.tcp.rfc1323=1 net.inet.tcp.sendbuf_auto=1 net.inet.tcp.sendbuf_inc=8192 net.inet.tcp.sendspace=65536 net.inet.udp.blackhole=1 net.inet.udp.maxdgram=57344 net.inet.udp.recvspace=65536 net.local.stream.recvspace=65536 net.local.stream.sendspace=65536 net.inet.tcp.sendbuf_max=16777216 net.inet.ip.random_id=1 http://serverfault.com/questions/64356/freebsd-performance-tuning-sysctls-loader-conf-kernel # Allow for up 2 GB of wired memory. vm.max_wired=524288 I will appreciate any input about the subject. --CJPM [1] http://harryd71.blogspot.com.es/2008/10/tuning-freenas-zfs.html [2] https://wiki.freebsd.org/SystemTuning#SYSCTL_TUNING [3] https://wiki.freebsd.org/NetworkPerformanceTuning [4] http://serverfault.com/questions/64356/freebsd-performance-tuning-sysctls-loader-conf-kernel
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