RE: How often is pass called?
What is doing the polling? FA As far as I can tell, nothing. I disagree. pass scripts shouldn't be run randomly. Turn on the -d switch to figure out what's doing the polling. Ok, I can't make sense of the log though. Excerpt below. (disman event mib support could certainly trigger it too, of course) We do use the monitor directive. /Fredrik Arnerup Received 1 bytes from callback: 39 on fd 83 : 10. Sending 1 bytes to callback: 39 on fd 83 : 0F. Received 1 bytes from callback: 1 on fd 4 : 00. Received SNMP packet(s) from callback: 1 on fd 4 GETNEXT message -- SNMPv2-SMI::enterprises.666.3.3 Sending 1 bytes to callback: 1 on fd 4 : 00. Received 1 bytes from callback: 39 on fd 83 : 10. Sending 1 bytes to callback: 39 on fd 83 : 10. Received 1 bytes from callback: 1 on fd 4 : 10. Received SNMP packet(s) from callback: 1 on fd 4 GETNEXT message -- SNMPv2-SMI::enterprises.666.3.4 Sending 1 bytes to callback: 1 on fd 4 : 00. Received 1 bytes from callback: 39 on fd 83 : 0F. Sending 1 bytes to callback: 39 on fd 83 : 0F. Received 1 bytes from callback: 1 on fd 4 : 0F. Received SNMP packet(s) from callback: 1 on fd 4 GETNEXT message -- SNMPv2-SMI::enterprises.666.3.5 -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, Big Spaceship. http://www.creativitycat.com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
Re: How often is pass called?
On Tue, 5 May 2009 16:04:47 +0200, Fredrik Arnerup fredrik.arne...@edgeware.tv said: What is doing the polling? FA As far as I can tell, nothing. I disagree. pass scripts shouldn't be run randomly. Turn on the -d switch to figure out what's doing the polling. (disman event mib support could certainly trigger it too, of course) -- Wes Hardaker Cobham Analytic Solutions -- Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
RE: How often is pass called?
FA Is is possible to control the interval between calls? Using the pass_persist method is a better way to accomplish external data than pass for exactly that reason: it leaves the process running and just interacts with it as needed. You can even implement caching within it if you want that as well. -- Wes Hardaker Cobham Analytic Solutions That means rewriting all our sensor programs. We were thinking of moving away from pass and starting using the exec method instead because we don't want the sensor programs to know about OID:s, or anything about snmp. So the question remains, what triggers snmpd to call these external programs? When I start snmpd it seems to call them once every 4 seconds, but after a while it is as often as 3 times a second, which is far to often. /Fredrik Arnerup -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
Re: How often is pass called?
On Tue, 5 May 2009 09:47:02 +0200, Fredrik Arnerup fredrik.arne...@edgeware.tv said: FA We were thinking of moving away from pass and starting using the exec method FA instead because we don't want the sensor programs to know about OID:s, or FA anything about snmp. That's definitely a benefit to the exec script. They're very simply to write and it doesn't require SNMP knowledge at all. FA So the question remains, what triggers snmpd to call these external FA programs? A request to the subtree. exec calls are cached for a bit, so that will help you there. FA When I start snmpd it seems to call them once every 4 seconds, but after a FA while it is as often as 3 times a second, which is far to often. The overhead you're seeing with execs is best avoidable by using a better infrastructure. I'm sorry if you'd have to recode things, but to be honest the speed rates are something like this (worst to best): - pass and exec - pass_persist - embedded perl - C -- Wes Hardaker Cobham Analytic Solutions -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
RE: How often is pass called?
FA So the question remains, what triggers snmpd to call these external FA programs? A request to the subtree. exec calls are cached for a bit, so that will help you there. That's good to know. FA When I start snmpd it seems to call them once every 4 seconds, but FA after a while it is as often as 3 times a second, which is far to often. I disabled port 161 in the firewall, so the only things that could make requests are the monitor statements. But the poll rate is still increasing. Now it's almost 4 calls per second (66 forks per second). /Fredrik Arnerup -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
Re: How often is pass called?
On Tue, 5 May 2009 13:55:14 +0200, Fredrik Arnerup fredrik.arne...@edgeware.tv said: FA But the poll rate is still increasing. Now it's almost 4 calls per second FA (66 forks per second). What is doing the polling? Make it increase it's timeout value (use -t 10 if it's our command line tools). -- Wes Hardaker Cobham Analytic Solutions -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
RE: How often is pass called?
FA But the poll rate is still increasing. Now it's almost 4 calls per FA second FA (66 forks per second). What is doing the polling? Make it increase it's timeout value (use -t 10 if it's our command line tools). As far as I can tell, nothing. All we have is a bunch of pass statements like pass .1.3.6.1.4.1.666.3 /usr/sbin/fan-sensor and then some monitor statements like monitor -r 5 -u testUser fanRotationTrap .1.3.6.1.4.1.666.3 3000 6000. External requests are blocked in the firewall and nothing else on the machine should be using snmp. /Fredrik Arnerup -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
Re: How often is pass called?
Wes Hardaker wrote: The overhead you're seeing with execs is best avoidable by using a better infrastructure. I'm sorry if you'd have to recode things, but to be honest the speed rates are something like this (worst to best): - pass and exec - pass_persist - embedded perl - C Not to mention that exec is deprecated in favour of extend, but with more or less the same overhead. +Thomas -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
How often is pass called?
Hello, We have a configuration where we have a number of sensor programs which are called using the pass directive. Snmpd was consuming quite a lot of cpu, so I checked the process with strace and it seems each sensor value is being polled twice a second. Since we have 18 sensor values, this means 36 forks per second. Is is possible to control the interval between calls? The 0.5 second interval seems to be regardless of whether clients are making requests to the agent. We have set traps with monitor on some of the sensors, but the interval for those is 5 seconds. Thanks for any help, /Fredrik Arnerup -- Register Now Save for Velocity, the Web Performance Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
Re: How often is pass called?
On Mon, 4 May 2009 11:58:48 +0200, Fredrik Arnerup fredrik.arne...@edgeware.tv said: FA Is is possible to control the interval between calls? Using the pass_persist method is a better way to accomplish external data than pass for exactly that reason: it leaves the process running and just interacts with it as needed. You can even implement caching within it if you want that as well. -- Wes Hardaker Cobham Analytic Solutions -- Register Now Save for Velocity, the Web Performance Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf ___ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
