Messages in this thread |  | | Subject | syslogd: recvfrom inet: resource temporarily unavailable | Date | Mon, 9 Sep 2002 11:14:55 -0400 | From | "Rechenberg, Andrew" <> |
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I am using a Dell PowerEdge 2300 running Red Hat Linux 7.2 for a syslog consolidation machine. It is also our network monitoring system and it runs Cricket, NMIS, and cflowd and Flowscan for Cisco NetFlow collection.
Lately the machine has been running extremely slow whenever anything that happens on the box needs to syslog something (su, logins, etc.). I've checked /var/log/messages and it repeatedly contains the following line:
Sep 6 14:23:54 cinshrnms02 syslogd: recvfrom inet: Resource temporarily unavailable
Notice the Recv-Q for the syslog port (UDP 514) in the netstat output below. The box does A LOT of SNMP polls as well as receives syslogs from about 6-8 Cisco routers (3600 series and 7100 series) on T1 and DS3 links.
My question is are there any compile-time or run-time options (via /proc) that I can tweak to get better syslog/UDP performance out of the box? Is there anything else at which I should be looking?
It's an old box (cpuinfo, meminfo, kernel info below), but I was having similar problems on a quad Xeon 700 with 2GB RAM. I've already upped /proc/sys/fs/file-max and /proc/sys/net/ipv4/ip_local_port_range
I may just need beefier hardware, but I wanted to see if there was anything else I could tweak before we spend cash :)
Thanks for your assistance, Andy.
Andrew Rechenberg Infrastructure Team, Sherman Financial Group arechenberg @ shermfin.com
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syslogd CMD line: syslogd -m 0 -r -x RPM: sysklogd-1.4.1-4 Kernel: RH 2.4.7-10
/proc/cpuinfo
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 5 model name : Pentium II (Deschutes) stepping : 2 cpu MHz : 397.958 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr bogomips : 794.62
/proc/meminfo
total: used: free: shared: buffers: cached: Mem: 525684736 416747520 108937216 315392 90697728 265424896 Swap: 534601728 0 534601728 MemTotal: 513364 kB MemFree: 106384 kB MemShared: 308 kB Buffers: 88572 kB Cached: 259204 kB SwapCached: 0 kB Active: 24156 kB Inact_dirty: 323928 kB Inact_clean: 0 kB Inact_target: 712 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 513364 kB LowFree: 106384 kB SwapTotal: 522072 kB SwapFree: 522072 kB NrSwapPages: 130518 pages
Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 10.1.1.56:8192 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:32768 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:2056 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:6000 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:34330 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN tcp 0 0 10.1.1.56:8697 10.1.1.72:6101 TIME_WAIT tcp 0 0 10.1.1.56:8696 10.1.1.72:6101 TIME_WAIT tcp 0 0 10.1.1.56:80 10.1.1.91:2878 TIME_WAIT tcp 0 0 10.1.1.56:22 10.1.1.35:37303 ESTABLISHED tcp 0 0 10.1.1.56:22 10.1.1.140:1399 ESTABLISHED udp 0 0 0.0.0.0:32768 0.0.0.0:* udp 41056 0 0.0.0.0:514 0.0.0.0:* udp 0 0 0.0.0.0:2055 0.0.0.0:* udp 0 0 0.0.0.0:69 0.0.0.0:* udp 0 0 0.0.0.0:69 0.0.0.0:* udp 0 0 0.0.0.0:734 0.0.0.0:* udp 0 0 0.0.0.0:111 0.0.0.0:* Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 1243 /usr/local/arts/etc/cflowdtable.socket unix 3 [ ] DGRAM 56399 /dev/log unix 2 [ ACC ] STREAM LISTENING 1015 /dev/gpmctl unix 2 [ ACC ] STREAM LISTENING 1125 /tmp/.font-unix/fs7100 unix 2 [ ACC ] STREAM LISTENING 1257 /tmp/.X11-unix/X0 unix 2 [ ] DGRAM 56409 unix 2 [ ] STREAM CONNECTED 55406 unix 2 [ ] STREAM CONNECTED 53649 unix 2 [ ] DGRAM 14449 unix 2 [ ] STREAM CONNECTED 2272 unix 2 [ ] DGRAM 1347 unix 3 [ ] STREAM CONNECTED 1304 /tmp/.X11-unix/X0 unix 3 [ ] STREAM CONNECTED 1303 unix 3 [ ] STREAM CONNECTED 1301 /tmp/.X11-unix/X0 unix 3 [ ] STREAM CONNECTED 1300 unix 3 [ ] STREAM CONNECTED 1297 /tmp/.X11-unix/X0 unix 3 [ ] STREAM CONNECTED 1296 unix 3 [ ] STREAM CONNECTED 1281 /tmp/.font-unix/fs7100 unix 3 [ ] STREAM CONNECTED 1280 unix 3 [ ] STREAM CONNECTED 1284 /tmp/.X11-unix/X0 unix 3 [ ] STREAM CONNECTED 1260 unix 2 [ ] DGRAM 1185 unix 2 [ ] DGRAM 1176 unix 2 [ ] DGRAM 1128 unix 2 [ ] DGRAM 996 unix 2 [ ] DGRAM 813 unix 2 [ ] STREAM CONNECTED 481
Andrew Rechenberg Infrastructure Team, Sherman Financial Group arechenberg@shermanfinancialgroup.com Phone: 513.677.7809 Fax: 513.677.7838 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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