search for: netdev_max_backlog

...r Qualify packets are lost, and temporarily disable handsets, causing all sorts of minor chaos. I have already tuned from the defaults of: net.core.rmem_max = 131071 net.core.wmem_max = 131071 net.core.rmem_default = 111616 net.core.wmem_default = 111616 net.core.optmem_max = 10240 net.core.netdev_max_backlog = 1000 up to: net.core.rmem_max = 1048575 net.core.wmem_max = 1048575 net.core.rmem_default = 1048575 net.core.wmem_default = 1048575 net.core.optmem_max = 1048575 net.core.netdev_max_backlog = 10000 with no luck. Any more suggestions? Many thanks, Steve

...he host and the guests) net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_no_metrics_save = 1 net.ipv4.tcp_moderate_rcvbuf = 1 # recommended to increase this for 1000 BT or higher net.core.netdev_max_backlog = 2500 sysctl -w net.ipv4.tcp_congestion_control=cubic Any ideas? -- --tmac RedHat Certified Engineer #804006984323821 (RHEL4) RedHat Certified Engineer #805007643429572 (RHEL5) Principal Consultant, RABA Technologies _______________________________________________ Xen-users mailing list Xe...

.../etc/sysctl.conf parameters: vm.dirty_ratio = 50 vm.dirty_background_ratio = 1 vm.dirty_expire_centisecs = 1000 vm.dirty_writeback_centisecs = 100 vm.min_free_kbytes = 65536 net.core.rmem_default = 262144 net.core.rmem_max = 262144 net.core.wmem_default = 262144 net.core.wmem_max = 262144 net.core.netdev_max_backlog = 25000 net.ipv4.tcp_reordering = 127 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_max_syn_backlog = 8192 net.ipv4.tcp_no_metrics_save = 1 The {r,w}mem_{max,default} values are twice what they were previously; changing these had no effect. The numb...

...012/04/09/syn-cookies.html Furthermore: "While you see SYN flood warnings in logs not being really flooded, your server is seriously misconfigured." *A potential fix* - increase the net.ipv4.tcp_max_syn_backlog kernel parameter. Or tune some more parameters like tcp_synack_retries and netdev_max_backlog *My question *- to fix this SYN flooding problem should I modify net.ipv4.tcp_max_syn_backlog, net.core.somaxconn and the backlog size passed to the listen() syscall or might there be an alternative easier fix such as installing 2.3.3-kh9<https://github.com/karlheyes/icecast-kh/archive/icecast-...

Hi, I''m doing some test on a network 10 gb nics and xen with version 3.1 i''m measuring 2.5 gb/sec from domU to an external physical machine with iperf. switching to 3.2 has reduced the measured performance to 40-50 Mb/sec. did anything change in the network interface? can someone help me? thanks _______________________________________________ Xen-users mailing list

Configuration: (2) Dual Core Opterons 8GB RAM Apache used to balance 40 mongrel instances We receive Application 500 Errors. Nothing suspect appears in the log, so we are at a lost as to what to do next. Any advice would be welcome and/or an explanation of what types of things cause Application 500 Errors in mongrel. Thanks! - Jared Brown -------------- next part -------------- An HTML

Hi all, I have a rhel 5.1 xen server with two rhel 3 ES hvm guests installed. Both rhel3 guests use an internal xen bridge (xenbr1) which it isn''t binded to any physical interface host. On this bridge throughput it is very very poor, only 2.5 Mbs. How can I increase this throughput??? Many thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

...RAID SAS 2108 [Liberator] (rev 05) 08:03.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200eW WPCM450 (rev 0a) /etc/sysctl.conf changes: net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 2621440 16777216 net.ipv4.tcp_wmem = 4096 2621440 16777216 net.core.netdev_max_backlog = 250000 net.ipv4.route.flush = 1 net.ipv4.tcp_window_scaling = 1 vm.dirty_writeback_centisecs = 50 Has anyone else seem similar issues? I can provide additional details about the server/configuration if anybody needs anything else. The issue only seems to occur under high write load as we'...

Hi, I have a problem with file transfers between a windows systems and unix systems. I have one win32 desktop (intel e6400 2Gb Ram), one win32 laptop (p-m 2Ghz). Also one linux laptop (p-m 1.4GHz) and one opensolaris desktop (intel e4400 1GB Ram). The two laptops have built-in 100Mbit ethernet and desktops have 1Gbit ethernet on the motherboard. Both desktops use a Marvell Yukon. The file

...crease TCP max buffer size settable using setsockopt() net.core.rmem_max = 67108864 net.core.wmem_max = 67108864 # increase Linux autotuning TCP buffer limit net.ipv4.tcp_rmem = 4096 87380 67108864 net.ipv4.tcp_wmem = 4096 65536 67108864 # increase the length of the processor input queue net.core.netdev_max_backlog = 250000 # recommended default congestion control is htcp net.ipv4.tcp_congestion_control=htcp # recommended for hosts with jumbo frames enabled net.ipv4.tcp_mtu_probing=1 Thomas W. Sr. Systems Administrator COLA/IGES twake at cola.iges.org Affiliate Computer Scientist GMU -------------- n...

https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=40 laforge@netfilter.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED ------- Additional Comments From laforge@netfilter.org 2003-02-03 16:49 ------- We haven't seen this

Looks like the GSO is involved? I got this while running Dom0 only (no guests), with a BOINC/Rosetta@home application running on all 4 cores. changeset: 10649:8e55c5c11475 Build: x86_32p (pae). ------------[ cut here ]------------ kernel BUG at net/core/dev.c:1133! invalid opcode: 0000 [#1] SMP CPU: 0 EIP: 0061:[<c04dceb0>] Not tainted VLI EFLAGS: 00210297 (2.6.16.13-xen