我继承了一个高容量缓存名称服务器环境(Redhat Enterprise Linux 5.8,IBM System x3550),它具有不一致的环形缓冲区设置：eth0为1020,eth1为255. eth0连接到其本地数据中心的交换机1,eth1连接到其本地数据中心的交换机2.群集中的每个服务器在eth0或eth1是否为活动接口之间交替,并且每个群集位于不同的区域中.显然需要使环缓冲区保持一致.
事情变得棘手：我在研究为什么许多名称服务器经常记录“错误发送响应：未设置”错误时发现了上述问题,其中the ISC knowledgebase suggests is related to outbound congestion.具有较高环形缓冲区设置(1020)的服务器在ifconfig上丢弃的数据包较少(正如人们所期望的那样),但往往会以极高的频率记录上述错误,在我的一个最高负荷组中每天约20k次.我们称之为“第1组”.具有较低环形缓冲区(255)设置的服务器每天显着减少更多入站数据包(再次,预期),但BIND错误的实例要少得多,通常在同一负载组中为0-150.
这里也不是一个巨大的谜.缓存DNS是一种递归服务：如果没有缓存某些内容,服务器必须代表该问题进行多个查询,直到它最终返回答案为止.这是一个(一个) – >(多个)查询关系.修复RX环缓冲区应该使这个数字在整个板上均衡为一个新值,从那里调整内核在proc中的出站网络队列(wmem_max / wmem_default)可能是个好主意.
我喜欢能够衡量配置更改对性能问题的影响,因此我在开始进行生产更改之前编写了一份报告来收集一些数据.以下是组1中前两个服务器的输出示例：
group1-01 RX: 7166.27/sec av. TX: 7432.57/sec av. RXDROP: 7.43/sec av. unset_err: 27633group1-02 RX: 7137.37/sec av. TX: 7398.50/sec av. RXDROP: 9.94/sec av. unset_err: 107
这些是公式.请注意,这是一个本地脚本,并且不依赖于必须按服务器维护的shell脚本.
RXPACK=$(ssh $server "sar -n DEV -f /var/log/sa/sa$(date --date=yesterday '+%d') | grep \"Average: .*$(awk '{if ($2 == "00000000") { print $1 }}' /proc/net/route)\" | awk '{print $3}'" 2>/dev/null) TXPACK=$(ssh $server "sar -n DEV -f /var/log/sa/sa$(date --date=yesterday '+%d') | grep \"Average: .*$(awk '{if ($2 == "00000000") { print $1 }}' /proc/net/route)\" | awk '{print $4}'" 2>/dev/null) RXDROP=$(ssh $server "sar -n EDEV -f /var/log/sa/sa$(date --date=yesterday '+%d') | grep \"Average: .*$(awk '{if ($2 == "00000000") { print $1 }}' /proc/net/route)\" | awk '{print $6}'" 2>/dev/null) TXDROP=$(ssh $server "sudo grep 'error sending response: unset' /var/log/dns_named.1" 2>/dev/null | wc -l) 一旦我开始在所有缓存DNS环境中运行此报告,我注意到另一个具有几乎相同的数据包负载的组(我们称之为组2)完全没有问题：
group2-01 RX: 7066.44/sec av. TX: 7345.95/sec av. RXDROP: 0.00/sec av. unset_err: 0group2-02 RX: 7019.18/sec av. TX: 7312.47/sec av. RXDROP: 0.00/sec av. unset_err: 0
问题是：
为什么group2的行为方式不需要进一步调整RX环缓冲区或net.core.wmem_default / net.core.wmem_max？无论如何我都需要规范化环形缓冲区,但是我想在开始在/ proc中使用wmem值之前了解其他内容.
我唯一能想到的是队列被应用程序更快地清空了,但是网络堆栈调整不是我有很多实践经验的东西,我想获得第二意见. (我的眼睛盯着一些ethtool柜台名称,我不会否认它)
我已经消除了以下可能性.分隔符后面的证明.
>环形缓冲区布局是相同的. (group1和group2的第一个服务器配置相同,group1和group2的第二个服务器配置相同)
>默认网关布局是相同的.
>网卡是一样的. (broadcom BCM5708)
> ethtool报告的固件版本是相同的. (bc 4.0.3 ipms 1.6.0)
> sysctl -a输出在两个组的第一个服务器和两个组的第二个服务器之间匹配. (不包括内核和fs部分)
>组1和组2中的服务器总数相同. (10)
出于保密原因,我无法显示原始的named.conf或我用来排除信息的grep过滤器.您将不得不承认以下配置参数在所有四个服务器之间保持不变：
notify no; allow-transfer { none; }; allow-recursion { any; }; allow-query { any; }; allow-query-cache { any; }; recursive-clIEnts 100000; max-cache-size 2G; max-ncache-ttl 900; 以下是大量的系统信息. “hosthash”只是为了证明循环的每次迭代实际上都是在不泄露实际主机名的情况下命中另一个服务器.
主机哈希：
group1-1: dc78abcb154b74c87feecb3f35222263d40c028cgroup1-2: 9fe491d58fd1e7d4e21e5bf10c164e4cf66e884bgroup2-1: fc76bb3ee1ff580c6aba0d685713bb4145bd5fe3group2-2: b7550c65d37622a131b1e47f066773defbb4d817for server in $group1_1 $group1_2 $group2_1 $group2_2do echo ____________________ ssh $server "echo -en hosthash: $(echo $HOSTname | sha1sum)\\n\\n && SARfile=/var/log/sa/sa$(date --date=yesterday '+%d') && uname -srvmpio && sudo /usr/sbin/dmIDecode -s system-product-name dmesg | grep broadcom && head /proc/cpuinfo && GWIF=$(awk '{if ($2 == 00000000) { print $1 }}' /proc/net/route) && sar -n DEV -f $SARfile | egrep '(IFACE|Average)' && sar -n EDEV -f $SARfile | egrep '(IFACE|Average)' && sudo /sbin/ethtool $GWIF && sudo /sbin/ethtool -i $GWIF && sudo /sbin/ethtool -g $GWIF && sudo /sbin/ethtool -c $GWIF && sudo /sbin/ethtool -S $GWIF && echo sysctl linecount: $(sudo /sbin/sysctl -a | egrep -v '^(fs|kernel)' | wc -l) && echo sysctl hash: $(sudo /sbin/sysctl -a | egrep -v '^(fs|kernel)' | sha1sum)"done 输出：
____________________hosthash: dc78abcb154b74c87feecb3f35222263d40c028c -linux 2.6.18-308.16.1.el5 #1 SMP Tue Sep 18 07:21:07 EDT 2012 x86_64 x86_64 x86_64 GNU/linuxIBM System x3550 -[7978AC1]-bnx2: broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.1.11 (July 20,2011)eth0: broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem c8000000,IRQ 90,node addr 001a649db00eeth1: broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem ce000000,IRQ 177,node addr 001a649db010cnic: broadcom NetXtreme II CNIC Driver cnic v2.5.7 (July 20,2011)broadcom NetXtreme II iSCSI Driver bnx2i v2.7.0.3 (Aug 04,2011)processor : 0vendor_ID : GenuineIntelcpu family : 6model : 23model name : Intel(R) Xeon(R) cpu E5420 @ 2.50GHzstepPing : 6cpu MHz : 2493.750cache size : 6144 KBphysical ID : 0siblings : 412:00:01 AM IFACE rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/sAverage: lo 1269.15 1269.15 206600.39 206600.39 0.00 0.00 0.00Average: eth0 7166.27 7432.57 704051.80 2419779.42 0.00 0.00 0.94Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.0012:00:01 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/sAverage: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 7.43 0.00 0.00 0.00 0.00 0.00Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00driver: bnx2version: 2.1.11firmware-version: bc 4.0.3 ipms 1.6.0bus-info: 0000:04:00.0Ring parameters for eth0:Pre-set maximums:RX: 2040RX Mini: 0RX Jumbo: 8160TX: 255Current harDWare settings:RX: 1020RX Mini: 0RX Jumbo: 0TX: 255Coalesce parameters for eth0:Adaptive RX: off TX: offstats-block-usecs: 999936sample-interval: 0pkt-rate-low: 0pkt-rate-high: 0rx-usecs: 18rx-frames: 12rx-usecs-irq: 18rx-frames-irq: 2tx-usecs: 80tx-frames: 20tx-usecs-irq: 18tx-frames-irq: 2rx-usecs-low: 0rx-frame-low: 0tx-usecs-low: 0tx-frame-low: 0rx-usecs-high: 0rx-frame-high: 0tx-usecs-high: 0tx-frame-high: 0NIC statistics: rx_bytes: 1505439501410 rx_error_bytes: 0 tx_bytes: 4672574845104 tx_error_bytes: 0 rx_ucast_packets: 15315548049 rx_mcast_packets: 2035415 rx_bcast_packets: 1101989 tx_ucast_packets: 15505474251 tx_mcast_packets: 40018 tx_bcast_packets: 36019 tx_mac_errors: 0 tx_carrIEr_errors: 0 rx_crc_errors: 0 rx_align_errors: 0 tx_single_collisions: 0 tx_multi_collisions: 0 tx_deferred: 0 tx_excess_collisions: 0 tx_late_collisions: 0 tx_total_collisions: 0 rx_fragments: 0 rx_jabbers: 0 rx_undersize_packets: 0 rx_oversize_packets: 0 rx_64_byte_packets: 92309552 rx_65_to_127_byte_packets: 1243637891 rx_128_to_255_byte_packets: 790117566 rx_256_to_511_byte_packets: 127197337 rx_512_to_1023_byte_packets: 168929387 rx_1024_to_1522_byte_packets: 11591832 rx_1523_to_9022_byte_packets: 0 tx_64_byte_packets: 60586118 tx_65_to_127_byte_packets: 1976738758 tx_128_to_255_byte_packets: 2830395753 tx_256_to_511_byte_packets: 157607989 tx_512_to_1023_byte_packets: 1483716940 tx_1024_to_1522_byte_packets: 406821340 tx_1523_to_9022_byte_packets: 0 rx_xon_frames: 0 rx_xoff_frames: 0 tx_xon_frames: 116422 tx_xoff_frames: 134780 rx_mac_ctrl_frames: 0 rx_filtered_packets: 0 rx_ftq_discards: 0 rx_discards: 0 rx_fw_discards: 14015105sysctl linecount: 504sysctl hash: dd6aab90d0fd9ae90742c5f812a78734e2f2ff1c -____________________hosthash: 9fe491d58fd1e7d4e21e5bf10c164e4cf66e884b -linux 2.6.18-308.16.1.el5 #1 SMP Tue Sep 18 07:21:07 EDT 2012 x86_64 x86_64 x86_64 GNU/linuxIBM System x3550 -[7978EHU]-bnx2: broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.1.11 (July 20,node addr 001a6479655ceth1: broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem ce000000,node addr 001a6479655ecnic: broadcom NetXtreme II CNIC Driver cnic v2.5.7 (July 20,2011)processor : 0vendor_ID : GenuineIntelcpu family : 6model : 23model name : Intel(R) Xeon(R) cpu E5420 @ 2.50GHzstepPing : 6cpu MHz : 2493.746cache size : 6144 KBphysical ID : 0siblings : 412:00:01 AM IFACE rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/sAverage: lo 1261.04 1261.04 205548.08 205548.08 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth1 7137.37 7398.50 702340.35 2409580.71 0.00 0.00 0.97Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.0012:00:01 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/sAverage: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth1 0.00 0.00 0.00 9.94 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00driver: bnx2version: 2.1.11firmware-version: bc 4.0.3 ipms 1.6.0bus-info: 0000:06:00.0Ring parameters for eth1:Pre-set maximums:RX: 2040RX Mini: 0RX Jumbo: 8160TX: 255Current harDWare settings:RX: 255RX Mini: 0RX Jumbo: 0TX: 255Coalesce parameters for eth1:Adaptive RX: off TX: offstats-block-usecs: 999936sample-interval: 0pkt-rate-low: 0pkt-rate-high: 0rx-usecs: 18rx-frames: 12rx-usecs-irq: 18rx-frames-irq: 2tx-usecs: 80tx-frames: 20tx-usecs-irq: 18tx-frames-irq: 2rx-usecs-low: 0rx-frame-low: 0tx-usecs-low: 0tx-frame-low: 0rx-usecs-high: 0rx-frame-high: 0tx-usecs-high: 0tx-frame-high: 0NIC statistics: rx_bytes: 1501719289640 rx_error_bytes: 0 tx_bytes: 4654179094291 tx_error_bytes: 0 rx_ucast_packets: 15253610508 rx_mcast_packets: 2108112 rx_bcast_packets: 1136240 tx_ucast_packets: 15438361249 tx_mcast_packets: 40135 tx_bcast_packets: 1721 tx_mac_errors: 0 tx_carrIEr_errors: 0 rx_crc_errors: 0 rx_align_errors: 0 tx_single_collisions: 0 tx_multi_collisions: 0 tx_deferred: 0 tx_excess_collisions: 0 tx_late_collisions: 0 tx_total_collisions: 0 rx_fragments: 0 rx_jabbers: 0 rx_undersize_packets: 0 rx_oversize_packets: 0 rx_64_byte_packets: 92376678 rx_65_to_127_byte_packets: 1183040190 rx_128_to_255_byte_packets: 788176623 rx_256_to_511_byte_packets: 126838328 rx_512_to_1023_byte_packets: 168170816 rx_1024_to_1522_byte_packets: 13350337 rx_1523_to_9022_byte_packets: 0 tx_64_byte_packets: 60806588 tx_65_to_127_byte_packets: 1955234150 tx_128_to_255_byte_packets: 2806601346 tx_256_to_511_byte_packets: 154015585 tx_512_to_1023_byte_packets: 1466206531 tx_1024_to_1522_byte_packets: 405928513 tx_1523_to_9022_byte_packets: 0 rx_xon_frames: 0 rx_xoff_frames: 0 tx_xon_frames: 150648 tx_xoff_frames: 173552 rx_mac_ctrl_frames: 0 rx_filtered_packets: 1 rx_ftq_discards: 0 rx_discards: 0 rx_fw_discards: 19605427sysctl linecount: 504sysctl hash: 4626e3788c72e091487afe1e3a7cfd32278ab07d -____________________hosthash: fc76bb3ee1ff580c6aba0d685713bb4145bd5fe3 -linux 2.6.18-308.16.1.el5 #1 SMP Tue Sep 18 07:21:07 EDT 2012 x86_64 x86_64 x86_64 GNU/linuxIBM System x3550 -[7978AC1]-bnx2: broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.1.11 (July 20,node addr 001a649dc68aeth1: broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem ce000000,node addr 001a649dc68ccnic: broadcom NetXtreme II CNIC Driver cnic v2.5.7 (July 20,2011)processor : 0vendor_ID : GenuineIntelcpu family : 6model : 23model name : Intel(R) Xeon(R) cpu E5420 @ 2.50GHzstepPing : 6cpu MHz : 2493.750cache size : 6144 KBphysical ID : 0siblings : 412:00:01 AM IFACE rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/sAverage: lo 1891.67 1891.67 266593.77 266593.77 0.00 0.00 0.00Average: eth0 7066.44 7345.95 730519.41 2215508.99 0.00 0.00 4.37Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.0012:00:01 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/sAverage: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00driver: bnx2version: 2.1.11firmware-version: bc 4.0.3 ipms 1.6.0bus-info: 0000:04:00.0Ring parameters for eth0:Pre-set maximums:RX: 2040RX Mini: 0RX Jumbo: 8160TX: 255Current harDWare settings:RX: 1020RX Mini: 0RX Jumbo: 0TX: 255Coalesce parameters for eth0:Adaptive RX: off TX: offstats-block-usecs: 999936sample-interval: 0pkt-rate-low: 0pkt-rate-high: 0rx-usecs: 18rx-frames: 12rx-usecs-irq: 18rx-frames-irq: 2tx-usecs: 80tx-frames: 20tx-usecs-irq: 18tx-frames-irq: 2rx-usecs-low: 0rx-frame-low: 0tx-usecs-low: 0tx-frame-low: 0rx-usecs-high: 0rx-frame-high: 0tx-usecs-high: 0tx-frame-high: 0NIC statistics: rx_bytes: 4640887074833 rx_error_bytes: 0 tx_bytes: 12640942400790 tx_error_bytes: 0 rx_ucast_packets: 46405845860 rx_mcast_packets: 14487857 rx_bcast_packets: 3476467 tx_ucast_packets: 47159091638 tx_mcast_packets: 118147 tx_bcast_packets: 5504 tx_mac_errors: 0 tx_carrIEr_errors: 0 rx_crc_errors: 0 rx_align_errors: 0 tx_single_collisions: 0 tx_multi_collisions: 0 tx_deferred: 0 tx_excess_collisions: 0 tx_late_collisions: 0 tx_total_collisions: 0 rx_fragments: 0 rx_jabbers: 0 rx_undersize_packets: 0 rx_oversize_packets: 0 rx_64_byte_packets: 136463411 rx_65_to_127_byte_packets: 4245502343 rx_128_to_255_byte_packets: 2357984838 rx_256_to_511_byte_packets: 355610202 rx_512_to_1023_byte_packets: 608223572 rx_1024_to_1522_byte_packets: 65320154 rx_1523_to_9022_byte_packets: 0 tx_64_byte_packets: 112166114 tx_65_to_127_byte_packets: 3010346100 tx_128_to_255_byte_packets: 4087240164 tx_256_to_511_byte_packets: 1625596725 tx_512_to_1023_byte_packets: 3037109096 tx_1024_to_1522_byte_packets: 927187571 tx_1523_to_9022_byte_packets: 0 rx_xon_frames: 0 rx_xoff_frames: 0 tx_xon_frames: 79164 tx_xoff_frames: 89685 rx_mac_ctrl_frames: 0 rx_filtered_packets: 1 rx_ftq_discards: 0 rx_discards: 0 rx_fw_discards: 6857729sysctl linecount: 504sysctl hash: dd6aab90d0fd9ae90742c5f812a78734e2f2ff1c -____________________hosthash: b7550c65d37622a131b1e47f066773defbb4d817 -linux 2.6.18-308.16.1.el5 #1 SMP Tue Sep 18 07:21:07 EDT 2012 x86_64 x86_64 x86_64 GNU/linuxIBM System x3550 -[7978EHU]-bnx2: broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.1.11 (July 20,node addr 00215e3f1ec4eth1: broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem ce000000,node addr 00215e3f1ec6processor : 0vendor_ID : GenuineIntelcpu family : 6model : 23model name : Intel(R) Xeon(R) cpu E5420 @ 2.50GHzstepPing : 6cpu MHz : 2493.753cache size : 6144 KBphysical ID : 1siblings : 412:00:01 AM IFACE rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/sAverage: lo 1883.04 1883.04 263726.79 263726.79 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth1 7019.18 7312.47 720911.92 2214861.10 0.00 0.00 1.02Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.0012:00:01 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/sAverage: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00driver: bnx2version: 2.1.11firmware-version: bc 4.0.3 ipms 1.6.0bus-info: 0000:06:00.0Ring parameters for eth1:Pre-set maximums:RX: 2040RX Mini: 0RX Jumbo: 8160TX: 255Current harDWare settings:RX: 255RX Mini: 0RX Jumbo: 0TX: 255Coalesce parameters for eth1:Adaptive RX: off TX: offstats-block-usecs: 999936sample-interval: 0pkt-rate-low: 0pkt-rate-high: 0rx-usecs: 18rx-frames: 12rx-usecs-irq: 18rx-frames-irq: 2tx-usecs: 80tx-frames: 20tx-usecs-irq: 18tx-frames-irq: 2rx-usecs-low: 0rx-frame-low: 0tx-usecs-low: 0tx-frame-low: 0rx-usecs-high: 0rx-frame-high: 0tx-usecs-high: 0tx-frame-high: 0NIC statistics: rx_bytes: 4621548539323 rx_error_bytes: 0 tx_bytes: 12598031299743 tx_error_bytes: 0 rx_ucast_packets: 46260356368 rx_mcast_packets: 5352446 rx_bcast_packets: 3474589 tx_ucast_packets: 47008853953 tx_mcast_packets: 118164 tx_bcast_packets: 5471 tx_mac_errors: 0 tx_carrIEr_errors: 0 rx_crc_errors: 0 rx_align_errors: 0 tx_single_collisions: 0 tx_multi_collisions: 0 tx_deferred: 0 tx_excess_collisions: 0 tx_late_collisions: 0 tx_total_collisions: 0 rx_fragments: 0 rx_jabbers: 0 rx_undersize_packets: 0 rx_oversize_packets: 0 rx_64_byte_packets: 126851062 rx_65_to_127_byte_packets: 4117708205 rx_128_to_255_byte_packets: 2346047550 rx_256_to_511_byte_packets: 356266112 rx_512_to_1023_byte_packets: 604666332 rx_1024_to_1522_byte_packets: 62938478 rx_1523_to_9022_byte_packets: 0 tx_64_byte_packets: 111216848 tx_65_to_127_byte_packets: 2984505931 tx_128_to_255_byte_packets: 4027485330 tx_256_to_511_byte_packets: 1577669672 tx_512_to_1023_byte_packets: 3015060448 tx_1024_to_1522_byte_packets: 933575954 tx_1523_to_9022_byte_packets: 0 rx_xon_frames: 0 rx_xoff_frames: 0 tx_xon_frames: 129873 tx_xoff_frames: 145090 rx_mac_ctrl_frames: 0 rx_filtered_packets: 1 rx_ftq_discards: 0 rx_discards: 0 rx_fw_discards: 6752713sysctl linecount: 504sysctl hash: 4626e3788c72e091487afe1e3a7cfd32278ab07d -解决方法 想知道这个盒子是戴尔吗？戴尔提供的bnx2i驱动程序和芯片组存在一个众所周知的问题.结果是在网络负载很重的情况下随机丢弃数据包.如果是这种情况,调谐环缓冲区可以触发它似乎是合乎逻辑的.
我相信戴尔提供他们自己的驱动程序版本作为修复.另一个解决方法是在modprobe.conf中执行以下 *** 作：
options bnx2i disable_msi = 1
无论如何,不能伤害尝试.而x2是什么kce说的.这是我见过的最好的书面问题之一.
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