[os::windows::snmp::plugin] - real-swap shows 191% usage

[joschi99]

If I want to monitor the windows swap memory using plugins 20181019 I got more then 100% of usage and other wrong values:

 /usr/lib/centreon/plugins/os-windows-snmp.pl --hostname=x.x.x.x --snmp-community=public --snmp-version=1 --plugin=os::windows::snmp::plugin --mode=swap --warning=80 --critical=90 --real-swap
CRITICAL: Swap Total: 21.48 GB Used: 41.04 GB (191.02%) Free: -20995571712.00 B (-91.02%) | 'used'=44062343168B;0:18453417164;0:20760094310;0;23066771456

[cgagnaire]

Hi @joschi99,
Can you try without --real-swap option and compare it to the actual swap consumption ?
Thanks.

[garnier-quentin]

I think we cannot solve it. It s an issue with 32 bits overflow.

[joschi99]

Hi @garnier-quentin,
sorry for my late answer. I missed your question from Oct 29. We have the problem only if we enable the --real-swap parameter.

This is a screenshot of hosts where swap is wrong (--real-swap)

Without the option --real-swap

and all other hosts similar to them

[garnier-quentin]

I think i have found the issue. In the mode, we substract the physical memory but we don t use the right allocation units. So if the allocation unit is the same for real and virtual memory, it s ok. Otherwise...

You don t miss my question ;)

[joschi99]

If you have a fix I can do some test.

[garnier-quentin]

I have done a patch. Could you test it with the following archive ?
https://github.com/garnier-quentin/centreon-plugins/archive/bug-win-real-swap.zip

[joschi99]

Hi @garnier-quentin,
I have done a test and the bug seem's still there. Below you can find the test output:

[root@ivertix-bypy centreon-plugins-bug-win-real-swap]# ./centreon_plugins.pl --hostname=xxx.xxx.xxx.xxx --snmp-community=xyxyxy --snmp-version=1 --plugin=os::windows::snmp::plugin --mode=swap --warning=80 --critical=90
OK: Swap Total: 9.25 GB Used: 2.41 GB (26.01%) Free: 6.84 GB (73.99%) | 'used'=2583232512B;0:7945270067;0:8938428825;0;9931587584
[root@ivertix-bypy centreon-plugins-bug-win-real-swap]# ./centreon_plugins.pl --hostname=xxx.xxx.xxx.xxx --snmp-community=xyxyxy --snmp-version=1 --plugin=os::windows::snmp::plugin --mode=swap --warning=80 --critical=90 --real-swap
CRITICAL: Swap Total: 1.25 GB Used: -1034878976.00 B (-77.10%) Free: 2.21 GB (177.10%) | 'used'=-1034878976B;0:1073741824;0:1207959552;0;1342177280

[garnier-quentin]

Could you provide a snmpwalk of following OID .1.3.6.1.2.1.25.2.3 ?

[joschi99]

HOST-RESOURCES-MIB::hrStorageIndex.1 = INTEGER: 1
HOST-RESOURCES-MIB::hrStorageIndex.2 = INTEGER: 2
HOST-RESOURCES-MIB::hrStorageIndex.3 = INTEGER: 3
HOST-RESOURCES-MIB::hrStorageIndex.4 = INTEGER: 4
HOST-RESOURCES-MIB::hrStorageIndex.5 = INTEGER: 5
HOST-RESOURCES-MIB::hrStorageType.1 = OID: HOST-RESOURCES-TYPES::hrStorageFixedDisk
HOST-RESOURCES-MIB::hrStorageType.2 = OID: HOST-RESOURCES-TYPES::hrStorageFixedDisk
HOST-RESOURCES-MIB::hrStorageType.3 = OID: HOST-RESOURCES-TYPES::hrStorageCompactDisc
HOST-RESOURCES-MIB::hrStorageType.4 = OID: HOST-RESOURCES-TYPES::hrStorageVirtualMemory
HOST-RESOURCES-MIB::hrStorageType.5 = OID: HOST-RESOURCES-TYPES::hrStorageRam
HOST-RESOURCES-MIB::hrStorageDescr.1 = STRING: C:\\ Label:  Serial Number 14b1885f
HOST-RESOURCES-MIB::hrStorageDescr.2 = STRING: D:\\ Label:DOC  Serial Number deea7e5b
HOST-RESOURCES-MIB::hrStorageDescr.3 = STRING: F:\\
HOST-RESOURCES-MIB::hrStorageDescr.4 = STRING: Virtual Memory
HOST-RESOURCES-MIB::hrStorageDescr.5 = STRING: Physical Memory
HOST-RESOURCES-MIB::hrStorageAllocationUnits.1 = INTEGER: 4096 Bytes
HOST-RESOURCES-MIB::hrStorageAllocationUnits.2 = INTEGER: 4096 Bytes
HOST-RESOURCES-MIB::hrStorageAllocationUnits.3 = INTEGER: 0 Bytes
HOST-RESOURCES-MIB::hrStorageAllocationUnits.4 = INTEGER: 65536 Bytes
HOST-RESOURCES-MIB::hrStorageAllocationUnits.5 = INTEGER: 65536 Bytes
HOST-RESOURCES-MIB::hrStorageSize.1 = INTEGER: 15638527
HOST-RESOURCES-MIB::hrStorageSize.2 = INTEGER: 707755263
HOST-RESOURCES-MIB::hrStorageSize.3 = INTEGER: 0
HOST-RESOURCES-MIB::hrStorageSize.4 = INTEGER: 151544
HOST-RESOURCES-MIB::hrStorageSize.5 = INTEGER: 131064
HOST-RESOURCES-MIB::hrStorageUsed.1 = INTEGER: 4194473
HOST-RESOURCES-MIB::hrStorageUsed.2 = INTEGER: 576151736
HOST-RESOURCES-MIB::hrStorageUsed.3 = INTEGER: 0
HOST-RESOURCES-MIB::hrStorageUsed.4 = INTEGER: 39422
HOST-RESOURCES-MIB::hrStorageUsed.5 = INTEGER: 55249
HOST-RESOURCES-MIB::hrStorageAllocationFailures.1 = Counter32: 0
HOST-RESOURCES-MIB::hrStorageAllocationFailures.2 = Counter32: 0
HOST-RESOURCES-MIB::hrStorageAllocationFailures.3 = Counter32: 0
HOST-RESOURCES-MIB::hrStorageAllocationFailures.4 = Counter32: 0
HOST-RESOURCES-MIB::hrStorageAllocationFailures.5 = Counter32: 0

[garnier-quentin]

Ok that's not working. Doing a substract was a wrong idea. To monitor swap, you should use nsclient and performance counter like 'Memory, Committed Bytes', 'Memory, Pages Output/Sec'. I think we should remove that option.

[joschi99]

I agree with you

[garnier-quentin]

I close it.