Edinilson, vc está certo... eu tb mexia mais nisso na epoca do 6, 7, 8.. Hj eles ajustaram tanta coisa (9 e 10) q talvez o default seja melhor q um 7 tunado...
(minha documentaçao caducou) testar, testar, testar... [ ]'s Fabricio Lima When your hammer is C++, everything begins to look like a thumb. 2014-11-05 16:44 GMT-02:00 Edinilson - ATINET <[email protected]>: > ----- Original Message ----- From: "Paulo Henrique - BSDs" < >> [email protected]> >> To: ""Lista Brasileira de Discussão sobre FreeBSD (FUG-BR)"" < >> [email protected]> >> Sent: Wednesday, November 05, 2014 3:58 PM >> Subject: [FUG-BR] Valor aconselhavel para variável HZ >> >> Saudações, >> >> Gostaria de saber se alguém trabalha com a variável HZ com o valor >> superior a 2000, caso sim o ambiente fica estável, há uma melhora no >> desempenho do sistema e da rede ? >> Sei que a mesma interfere quanto ao uso da bateria em portáteis contudo a >> duvida é restrita a servidores. >> Aumentar o valor da mesma em um servidor com 12 Cores / 24 Threads com >> 32Gbytes de ram melhorará o desempenho. >> Abaixo tem os dados do sistema atualmente. >> O HZ do sistema está em 2000. >> >> uname -a >> FreeBSD xxxxx 10.0-STABLE FreeBSD 10.0-STABLE #0 r269344: Thu Jul 31 >> 14:39:46 BRT 2014 >> netstat -m >> yyyyyyy@xxxxx:/usr/obj/usr/src/sys/XXXXXXXXXXX amd64 >> 11204/15571/26775 mbufs in use (current/cache/total) >> 1023/9825/10848/2036062 mbuf clusters in use (current/cache/total/max) >> 1023/9512 mbuf+clusters out of packet secondary zone in use >> (current/cache) >> 0/548/548/1018031 4k (page size) jumbo clusters in use >> (current/cache/total/max) >> 0/0/0/301638 9k jumbo clusters in use (current/cache/total/max) >> 0/0/0/169671 16k jumbo clusters in use (current/cache/total/max) >> 4847K/25734K/30581K bytes allocated to network (current/cache/total) >> 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) >> 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) >> 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) >> 0/0/0 requests for jumbo clusters denied (4k/9k/16k) >> 0 requests for sfbufs denied >> 0 requests for sfbufs delayed >> 9966280 requests for I/O initiated by sendfile >> >> uptime >> 15:47 up 86 days, 19:40, 1 user, load averages: 8,15 8,86 9,27 >> >> >> Alguns tunnings que já foi feito no sistema. >> >> # $FreeBSD: stable/10/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 >> >> kern.maxfiles=1000000 >> >> # Otimizacoes de rede. >> #kern.ipc.nmbclusters=131072 # 128Mb para buffer de rede - Ficou instavel >> valor definido pelo sistema. >> kern.ipc.maxsockbuf=33554432 >> net.inet.tcp.sendbuf_max=33554432 >> net.inet.tcp.recvbuf_max=33554432 >> net.inet.tcp.sendspace=1048576 # default 65536 >> net.inet.tcp.recvspace=1048576 # default 32768 >> net.inet.tcp.sendbuf_inc=1048576 # 8192 default >> net.inet.tcp.recvbuf_inc=1048576 # 16384 default >> kern.ipc.somaxconn=4096 # 128 default >> net.inet.tcp.syncache.rexmtlimit=1 >> net.inet.tcp.syncookies=1 >> >> # COnfigura▒▒es de Seguran▒a >> # General Security and DoS mitigation. >> net.inet.ip.check_interface=1 # verify packet arrives on correct interface >> net.inet.ip.portrange.randomized=1 # randomize outgoing upper ports >> net.inet.ip.process_options=0 # IP options in the incoming packets will >> be ignored >> net.inet.ip.random_id=1 # assign a random IP_ID to each packet leaving >> the system >> net.inet.ip.redirect=0 # do not send IP redirects >> net.inet.ip.accept_sourceroute=0 # drop source routed packets since they >> can not be trusted >> net.inet.ip.sourceroute=0 # if source routed packets are accepted the >> route data is ignored >> #net.inet.ip.stealth=1 # do not reduce the TTL by one(1) when a packets >> goes through the firewall >> net.inet.icmp.bmcastecho=0 # do not respond to ICMP packets sent to IP >> broadcast addresses >> net.inet.icmp.maskfake=0 # do not fake reply to ICMP Address Mask Request >> packets >> net.inet.icmp.maskrepl=0 # replies are not sent for ICMP address mask >> requests >> net.inet.icmp.log_redirect=0 # do not log redirected ICMP packet attempts >> net.inet.icmp.drop_redirect=1 # no redirected ICMP packets >> #net.inet.icmp.icmplim=50 # 50 ICMP packets per second. a reasonable >> number for a small office. >> #net.inet.tcp.delayed_ack=1 # always employ delayed ack, 6 packets get 1 >> ack to increase bandwidth >> net.inet.tcp.drop_synfin=1 # SYN/FIN packets get dropped on initial >> connection >> net.inet.tcp.ecn.enable=1 # explicit congestion notification (ecn) >> warning: some ISP routers abuse it >> net.inet.tcp.fast_finwait2_recycle=1 # recycle FIN/WAIT states quickly >> (helps against DoS, but may cause false RST) >> net.inet.tcp.icmp_may_rst=0 # icmp may not send RST to avoid spoofed >> icmp/udp floods >> net.inet.tcp.maxtcptw=15000 # max number of tcp time_wait states for >> closing connections >> net.inet.tcp.msl=5000 # 5 second maximum segment life waiting for an ACK >> in reply to a SYN-ACK or FIN-ACK >> net.inet.tcp.path_mtu_discovery=0 # disable MTU discovery since most >> ICMP packets are dropped by others >> net.inet.tcp.rfc3042=0 # disable the limited transmit mechanism which can >> slow burst transmissions >> #net.inet.tcp.sack.enable=1 # sack disabled? http://www.ibm.com/ >> developerworks/linux/library/l-tcp-sack/index.html >> net.inet.udp.blackhole=1 # drop udp packets destined for closed sockets >> net.inet.tcp.blackhole=2 # drop tcp packets destined for closed ports >> #net.route.netisr_maxqlen=4096 # route queue length defaults 4096 (rtsock >> using "netstat -Q") >> security.bsd.see_other_uids=0 # hide processes for root from user uid's >> >> ## Configuracoes de envio >> >> net.local.stream.sendspace=164240 >> net.local.stream.recvspace=164240 >> >> ## Configuracoes contra spoof >> >> net.inet.ip.rtexpire=60 # 3600 secs >> net.inet.ip.rtminexpire=2 # 10 secs >> net.inet.ip.rtmaxcache=1024 # 128 entries >> >> Qualquer orientação é bem vinda. >> >> > Ate o FreeBSD 7 eu ate que me preocupava em ficar mexendo no hz. Apos > isto, e com estas interfaces de rede modernas da Intel, nao me preocupo > mais (nem com hz nem com polling) pois PARECE nao mudar muito coisa. > > Veja uma discussao de 2005 sobre o hz onde ja se discutia isto: > http://lists.freebsd.org/pipermail/freebsd-questions/ > 2005-April/083482.html > > e veja tambem este link, na parte onde esta o hz o que ele diz: > https://calomel.org/freebsd_network_tuning.html > > > Edinilson > ------------------------------------------ > ATINET > Tel Voz: (0xx11) 4412-0876 > http://www.atinet.com.br > > > > ------------------------- > Histórico: http://www.fug.com.br/historico/html/freebsd/ > Sair da lista: https://www.fug.com.br/mailman/listinfo/freebsd > ------------------------- Histórico: http://www.fug.com.br/historico/html/freebsd/ Sair da lista: https://www.fug.com.br/mailman/listinfo/freebsd
