Hi All --
Running Net-SNMP 5.4.1 on a wide range of Solaris and Linux boxes /w NPM 9.1 SP5 monitoring a range of params.
The problem is with the "Physical memory" monitoring.
Linux MemFree includes Cached memory. The cache is typically a filesystem cache where the kernel helpfully places recently read/written files for quick retrieval later.
The issue is on all our Linux boxes that over time [as more and more files are read], Physical memory usage always climbs to 99% [with the kernel helpfully not allocating to the cache about 6megs :)] See attachment. Its the same story for all recent Linux kernels.
This isn't a problem in so far as actual memory usage = MemTotal - Cached, however it basically renders default memory monitoring on NPM useless [and from reading many forum postings, I presume most people just turn it off].
The thing is I want to know/alert if real memory usage gets above say 80%, etc.
# cat /proc/meminfo
MemTotal: 3995632 kB
MemFree: 66236 kB
Buffers: 324112 kB
Cached: 2719860 kB
SwapCached: 68 kB
Active: 2466712 kB
Inactive: 1215628 kB
free -m
total used free shared buffers cached
Mem: 3901 3851 50 0 316 2669
-/+ buffers/cache: 865 3036
Swap: 12001 0 12001
HOST-RESOURCES-MIB::hrStorageDescr.1 = STRING: Physical memory
HOST-RESOURCES-MIB::hrStorageDescr.3 = STRING: Virtual memory
HOST-RESOURCES-MIB::hrStorageDescr.6 = STRING: Memory buffers
HOST-RESOURCES-MIB::hrStorageDescr.7 = STRING: Cached memory
HOST-RESOURCES-MIB::hrStorageDescr.8 = STRING: Shared memory
HOST-RESOURCES-MIB::hrStorageDescr.10 = STRING: Swap space
HOST-RESOURCES-MIB::hrStorageSize.1 = INTEGER: 3995632
HOST-RESOURCES-MIB::hrStorageSize.3 = INTEGER: 16285348
HOST-RESOURCES-MIB::hrStorageSize.6 = INTEGER: 324052
HOST-RESOURCES-MIB::hrStorageSize.7 = INTEGER: 2750756
HOST-RESOURCES-MIB::hrStorageSize.8 = INTEGER: 0
HOST-RESOURCES-MIB::hrStorageSize.10 = INTEGER: 12289716
The free shows both views, including and excluding the cache/buffers.
Essentially I would like to graph/monitor the (MemTotal - (MemFree-Buffers)), or in OID talk, (hrStorageSize.1 - hrStorageDescr.7)
So I spose to my question. Can I modify the query to do some maths, and remove the cache from the calculation that will monitor the Free Memory?
Cheers, Johhny.
I use solarwinds NPM9.5 could see cpu,memory,volumes,interface,but I could not see any about Checkpoint value.If I open both snmp of splat and cp,but I only can monitor port 161,when i add node with port 260,it always show no respond,I check the firewall log,it was accept,anyone can help me?
Thanks.
I am planning to add some Cisco switches later today on NPM 9.5 I was wondering what's the SNMPv3 context section about? I know you can leave it blank.... I hope but I was wondering if I had to fill that in what would go in there
It would be good to know for future knowledge
Thanks
In case anyone is trying to get SNMPv3 working, I created a tutorial for our engineers and thought I would post the link for people here. https://packetpros.com/netmon/SNMPv3_Orion.html [updated link]
What is the default password for SolarWindsOrionDatabaseUser under Orion Configuration Wizard?
Hi,
great new feature! This bings big value to this product!
Since the documentation about monitoring UCS is not very extensive....
I have to add the Blades of my UCS, but the SNMP credentials of the fabrics doesn't seem to work here.
Do you know if I can query them via SNMP, or are they just pingable?
thanks,
Herwig
Ok, so I'm not a Cisco guru, enough said. That being the case, what is the difference between the "logging trap" and "snmp-server enable traps"? I am assuming they are for two completely different puposes. Can anyone explain.
I see a lot of questions regrading monitoring Windows Disk I/O so I figured I would quickly highlight two different ways I have been able to accomplish this. The first way utilizes SNMP Informant Standard which is a free SNMP extensibility agent that you can install on Windows systems and can be monitored using just NPM and UnDP's. The second way utilizes WMI counters, it doesn't require anything special to be installed on the Windows systems but will require APM.
See my UnDP's uploaded to the content exchange located Windows Disk IO Using SNMP Informantwhich includes a link to SNMP Informant. I personally prefer this method to get disk I/O. Below is a screenshot of what it looks like on one of my systems.
See my APM Template that I have uploaded to the Content Exchange located Windows Disk I/O. Below is a screenshot of what this method looks like on one of my systems (note in this example I show only Reads but the template includes both Reads and Writes).
Please feel free to provide feedback. Also, if you have other ways that you have accomplished Disk I/O monitoring with Orion I would be interested in hearing about it.
P.S. I tried to post this, or at least a version of this yesterday but it didn't post, hopefully this one will work.
I have a netscaler that I use for my citrix environment as a gateway. when I configured snmp and added it to solarwinds I only get the interfaces listed under the list resources. How do I get it to show me everything else like ram, cpu, etc?
I am planning to add some Cisco switches later today on NPM 9.5 I was wondering what's the SNMPv3 context section about? I know you can leave it blank.... I hope but I was wondering if I had to fill that in what would go in there
It would be good to know for future knowledge
Thanks
I have looked through the Admin guide and the often referenced Cisco doc on SNMP v3. I have gone through the many posts on it as well. So I am starting to think I am doing something uniquely dumb.
Below is my Cisco switch config, I know there is some overlap on the views but I just kept getting broader to try and fix the problem. In NPM it says credentials fail, however when I use the SNMP Tester tool in the engineer toolset I get a more specific error.
ERROR: SNMPv3 - Unsupported Security Level - Either the requested MIB is not readable for this username, or this username requires a higher level of authentication / encryption.
Cisco SNMP config:
snmp-server group GROUPNAME v3 auth read view_all write view_all access 6
snmp-server view view_all iso included
snmp-server view view_all internet included
snmp-server view view_all system included
snmp-server view view_all interfaces included
snmp-server view view_all chassis included
snmp-server community public RO 5
snmp-server host 10.27.28.5 public
The last 2 lines are there so I can still monitor the switch while i figure this out.
I used this to config the user:
snmp-user USERNAME GROUPNAME v3 auth md5 PASSWORD access 6
Help please!
Hi!!
I have two stacks of Cisco 3850's and both of them are reporting that the temperature is around 4 degrees Celsius. I have had both Solarwinds Support and Cisco Support look at this.
We did a SNMPWALK to check the MIB's and they seem correct, but when it comes to posting the temperatures in NPM, they are way off.
The switches say they are a happy 25 degrees Celsius. That I can beleive becasue my closet is at a comfortable temerature.
Our Internet Cisco router is showing no interface errors, but Orion is showing interface transmit discard errors in the thousands. Shouldn't the counts match?
Hi
I need to configure NPM to send Email Alerts Notifications.
Any idea to do it?
Thanks.
I see a lot of questions regrading monitoring Windows Disk I/O so I figured I would quickly highlight two different ways I have been able to accomplish this. The first way utilizes SNMP Informant Standard which is a free SNMP extensibility agent that you can install on Windows systems and can be monitored using just NPM and UnDP's. The second way utilizes WMI counters, it doesn't require anything special to be installed on the Windows systems but will require APM.
See my UnDP's uploaded to the content exchange located Windows Disk IO Using SNMP Informantwhich includes a link to SNMP Informant. I personally prefer this method to get disk I/O. Below is a screenshot of what it looks like on one of my systems.
See my APM Template that I have uploaded to the Content Exchange located Windows Disk I/O. Below is a screenshot of what this method looks like on one of my systems (note in this example I show only Reads but the template includes both Reads and Writes).
Please feel free to provide feedback. Also, if you have other ways that you have accomplished Disk I/O monitoring with Orion I would be interested in hearing about it.
P.S. I tried to post this, or at least a version of this yesterday but it didn't post, hopefully this one will work.
I have a netscaler that I use for my citrix environment as a gateway. when I configured snmp and added it to solarwinds I only get the interfaces listed under the list resources. How do I get it to show me everything else like ram, cpu, etc?
Hi All --
Running Net-SNMP 5.4.1 on a wide range of Solaris and Linux boxes /w NPM 9.1 SP5 monitoring a range of params.
The problem is with the "Physical memory" monitoring.
Linux MemFree includes Cached memory. The cache is typically a filesystem cache where the kernel helpfully places recently read/written files for quick retrieval later.
The issue is on all our Linux boxes that over time [as more and more files are read], Physical memory usage always climbs to 99% [with the kernel helpfully not allocating to the cache about 6megs :)] See attachment. Its the same story for all recent Linux kernels.
This isn't a problem in so far as actual memory usage = MemTotal - Cached, however it basically renders default memory monitoring on NPM useless [and from reading many forum postings, I presume most people just turn it off].
The thing is I want to know/alert if real memory usage gets above say 80%, etc.
# cat /proc/meminfo
MemTotal: 3995632 kB
MemFree: 66236 kB
Buffers: 324112 kB
Cached: 2719860 kB
SwapCached: 68 kB
Active: 2466712 kB
Inactive: 1215628 kB
free -m
total used free shared buffers cached
Mem: 3901 3851 50 0 316 2669
-/+ buffers/cache: 865 3036
Swap: 12001 0 12001
HOST-RESOURCES-MIB::hrStorageDescr.1 = STRING: Physical memory
HOST-RESOURCES-MIB::hrStorageDescr.3 = STRING: Virtual memory
HOST-RESOURCES-MIB::hrStorageDescr.6 = STRING: Memory buffers
HOST-RESOURCES-MIB::hrStorageDescr.7 = STRING: Cached memory
HOST-RESOURCES-MIB::hrStorageDescr.8 = STRING: Shared memory
HOST-RESOURCES-MIB::hrStorageDescr.10 = STRING: Swap space
HOST-RESOURCES-MIB::hrStorageSize.1 = INTEGER: 3995632
HOST-RESOURCES-MIB::hrStorageSize.3 = INTEGER: 16285348
HOST-RESOURCES-MIB::hrStorageSize.6 = INTEGER: 324052
HOST-RESOURCES-MIB::hrStorageSize.7 = INTEGER: 2750756
HOST-RESOURCES-MIB::hrStorageSize.8 = INTEGER: 0
HOST-RESOURCES-MIB::hrStorageSize.10 = INTEGER: 12289716
The free shows both views, including and excluding the cache/buffers.
Essentially I would like to graph/monitor the (MemTotal - (MemFree-Buffers)), or in OID talk, (hrStorageSize.1 - hrStorageDescr.7)
So I spose to my question. Can I modify the query to do some maths, and remove the cache from the calculation that will monitor the Free Memory?
Cheers, Johhny.