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Date: Sat, 10 Dec 2005 14:58:21 -0800
From: "Jin Guojun [VFFS]" <j_guojun@lbl.gov>
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To: Mathieu Arnold <mat@mat.cc>
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Cc: Imri Zvik <imriz@co.zahav.net.il>, freebsd-performance@freebsd.org
Subject: Re: very busy syslog server
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What is "netstat -m" output on your machine?

Mathieu Arnold wrote:

>+-le 07/12/2005 12:44 +0200, Imri Zvik écrivait :
>| Hi!
>| 
>| I'm trying to setup a syslog server to serve a large group of servers.
>| For the syslog daemon, I have chosen rsyslogd, and the backend is mysql (on
>| a different machine).
>| 
>| The machine has 2 Intel Xeon 2.80GHz CPUs, and 1GB of RAM, and it is
>| running FreeBSD 6 (6.0-STABLE).
>| 
>| The problem is, that I see a lot of UDP packets being dropped:
>
>without any tweaking :
># netstat -s -p udp
>udp:
>        750858021 datagrams received
>        0 with incomplete header
>        0 with bad data length field
>        0 with bad checksum
>        20003 with no checksum
>        142075741 dropped due to no socket
>        1152246 broadcast/multicast datagrams dropped due to no socket
>        1729027 dropped due to full socket buffers
>        0 not for hashed pcb
>        605901007 delivered
>        801662 datagrams output
>
>it's been up for a bit, and I don't use syslog but minirsyslogd, which is in
>the ports tree I believe.
>
>CPU: Intel(R) Celeron(R) CPU 2.40GHz (2400.09-MHz 686-class CPU)
>  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
>
>Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>real memory  = 259194880 (247 MB)
>avail memory = 243978240 (232 MB)
>  
>