From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christopher Chan Subject: Re: High number of concurrent connections causes 2.6.4 to go berserk Date: Sat, 03 Apr 2004 00:37:21 +0800 Sender: netdev-bounce@oss.sgi.com Message-ID: <406D96C1.2000901@outblaze.com> References: <406CBA60.50103@outblaze.com> <406CDDF5.4070500@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com, Yusuf Goolamabbas Return-path: To: Nivedita Singhvi In-Reply-To: <406CDDF5.4070500@us.ibm.com> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org >> The below values seem to workaround whatever problem the kernel has. >> >> tcp_max_syn_backlog = 2048 >> route.max_size = 1048576 >> route.gc_thresh = 65536 I take that back. Under peak hours, the kernel starts spewing its stuff onto serial console and network connectivity is lost. What it spews is not human readable anymore. eg: 3->g:asag6A &| rKEt d n SE1PERUELnet p-15 ( t bL:(D3laEED1 f))sspv/ipi 3->g:asag6A &| <3leaititv4d_>r<3_npiti (q G__TRNtd (c p. =msRN||E1(f_P33KNC: t/ne>c7116p-ug ala7gsK 2 a) sev4ipie<6) : ssgsA & M3>ediliocp/tsre3>nxieio(M E_PTRNE na(t (.c==sgNE| 1DflPE3D)C) a/ietco1)63->g:asag6A | ai fer4/pved6> cvcses s MMS>Kd leonp.tceqc>KxtedonMSE1PERUELnet p(1c = g EL (D3laEED1 f)asipt/op) 3->g:asag6A | ai fer4/pved6> cvcoes s MMS>Kd leonp.tceqc>KxtedonMSE1PERUELnet p-1c = g EL (D3laEED1 f))sipt/op) 3->g:asag6A &| r<3_npiti eqSGG_ERatd (ccpq vmER | E (G_D3EKNC:et n->57(1tpbu: fl37gsK12fa) sev4ipie<6) c csesA & M3>ediliocp/tseec>nxieio(M E_PTRNE nattp(.c==sgNE| 1DflPE3D) ))asietco1)63->g:asag6A &| r<3_npiti eqSGG_ERatd (c p. =msRN| E (G_D3EKNC: t/ne>c711tpbu: fl37gsK 2 a) sev4ipi