For compatibility with PowerShell 7 (pwsh), you'll use the Get-CimInstance cmdlet and not Get-WmiObject. This is because Get-WmiObject is not compatible with PowerShell 7. Whether or not Win32_PerfRawData_W3SVC_WebService is faster than Get-Counter, it gives you more flexibility to create advanced monitoring scripts.
See Monitor website performance in IIS with Zabbix for a more complete solution in Zabbix
Query Win32_PerfRawData_W3SVC_WebService in PowerShell
The Web Service object includes counters specific to the World Wide Web Publishing Service and is a subclass of Win32_PerfRawData. You may remember Win32_PerfRawData from my Zabbix posts, where I use it to monitor various aspects of IIS websites and application pools.
- Monitor IIS application pools in Zabbix, part 1
- ASP.NET web application monitoring in Zabbix, part 2
- Getting more out your Windows Performance Counters monitoring for web applications – part 3
- Monitor .NET CLR Garbage Collected heap from your web application
- Monitor website performance in IIS with Zabbix
You find more information about Win32_PerfRawData_W3SVC_WebService and its properties on wutils.com.
Knowing the property you want to query, CurrentConnections, it's easy to create a WQL or WMI query:
Get-CimInstance -EA SilentlyContinue `
-Query "select * from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2
This queries Win32_PerfRawData_W3SVC_WebService for all properties (counters) in all websites. If that is a bit too much for your taking, you can add filters. You either use Select-Object to select the objects you want, or you only query the the property you want (and select them to avoid empty values):
Get-CimInstance -EA SilentlyContinue `
-Query "select * from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2 `
| Select-Object Name,CurrentConnections
Get-CimInstance -EA SilentlyContinue `
-Query "select Name,CurrentConnections from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2 `
| Select-Object Name,CurrentConnections
Use Where-Object as a WHERE clause to select the rows that meet certain conditions, for example list all sites having more than 70 CurrentConnections:
Get-CimInstance -EA SilentlyContinue `
-Query "select * from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2 `
| Where-Object { $_.CurrentConnections -ge "70" } `
| Select-Object Name, CurrentConnections
You can even filter on these results further using Sort-Object for example:
Get-CimInstance -EA SilentlyContinue `
-Query "select * from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2 `
| Select Name,CurrentConnections `
| Sort-Object CurrentConnections -Descending
Get-CimInstance -EA SilentlyContinue `
-Query "select * from Win32_PerfRawData_W3SVC_WebService" `
-Namespace root\cimv2 `
| Where-Object { $_.CurrentConnections -ge "70" } `
| Select-Object Name, CurrentConnections `
| Sort-Object CurrentConnections -Descending
Get-Counter cmdlet in PowerShell
Oh, you want to use the Get-Counter cmdlet to query IIS for the total amount of connections? Okay, here's how:
Get-Counter "\Web Service(website.Name)\Current Connections"
Substitute website.Name with the name of the website you want to query the total number of connections for, or use * for all sites ("\Web Service(*)\Current Connections"). To get the number of active connections on your IIS server, use this:
( `
( `
Get-Counter -Counter \"Web Service(_total)\current connections" `
-computer $env:COMPUTERNAME `
) `
| Select-Object -Expand countersamples `
).Cookedvalue
Conclusion getting current connections to IIS
In this post I showed you various ways of getting the number of current, active, connections to IIS using PowerShell. Either by WQL querying Win32_PerfRawData_W3SVC_WebService or Get-Counter. Performing these actions at the right time might help you identifying a website responsible for TCP/IP port exhaustion, application pool hangs and can help you tune Windows Server and IIS' TCP/IP stack.
Whether or not Win32_PerfRawData_W3SVC_WebService is faster than Get-Counter, it does give you the flexibility to create advanced PowerShell scripts for your Zabbix monitoring templates.