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APM WQL - % Disk Time - help needed

Hello,

I'm trying to gather % disk time from Windows servers via WMI.

I've created a WMI Monitor with the correct permissions to execute - the monitor tests just fine but returns no data while perfmon on the system is showing data.

Any help appreciated.

SELECT PercentDiskTime FROM Win32_PerfFormattedData_PerfDisk_PhysicalDisk WHERE Name='1 C:'

(in second monitor)

SELECT PercentDiskTime FROM Win32_PerfFormattedData_PerfDisk_PhysicalDisk WHERE Name='1 '

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Accepted answers

jiri.tomek

Hello gork,
what version of APM do you have? Starting APM 3.0 we suggest using new Performance Counter Monitor in Custom Component Monitors. It's intended for monitoring of performance counters on Windows computers. You can also try "Find Processes, Services, and Performance Counters" wizard in APM administration that can search for performance counters for you and you just have to select those you want to monitor.

All comments

mrxinu

When you say it has the correct permissions, have you tried those credentials from the application server? On the command-line for example?

C:\PS> get-wmiobject -credential DOMAIN\username -computer remotecomputer -query "select percentdisktime from win32_perfformatteddata_perfdisk_physicaldisk where name = '1 C:'"

jiri.tomek

gork

Thanks Jiri, I had tried the same using the Performance Counter monitor which returned the same results (which is one of the factors that caused me to post). I've been using the "Find processes" wizard which has really helpled quickly locate information.

One of the issues may be sampling time, while the disk utilization is never zero (I've even spiked IO on the drive using tools just to check it) the raw data shows nothing but zeros. On the same server if I look at disk idle time it's shown at 100% while looking at perfmon it's clearly not.

While disk space consumption is important to monitor we frequently have disks with high level of I/O which is more critical to monitor than even space. One of the issues I'm running into with drives is that the servers may not always be uniform (different drive letters) which causes us to have 4-6 stats to monitor per drive letter. Any changes require a lot of manual editing.

It would be nice to be able to apply some type of mass variable (look for these stats for all drives with letters c-z and roll up information for each) as well as a way to exclude drives for specific servers.

I'll keep working on this today.

jiri.tomek

I don't really get if you can measure disk utilization using perfmon on computer with those disks or on remote computer using perfmon to remote monitoring.

So if you run perfmon on server with APM and connect it to server you want to monitor, do you get correct values? Or do you get them only if using perfmon on that computer locally?