By default, the SQL Server integration will only collect the metrics listed in the docs page here. But you can collect additional metrics from your SQL Server integration by configuring your
sqlserver.yaml following the syntax in our example file here (these will go under "init_config").
Note that, at this time, our sqlserver check only queries data from the sys.dm_os_performance_counters table (although you can use WMI to expose metrics from other counter tables). So the trick to collecting specific metrics will be to find which counter_name and (if appropriate) instance_name correspond to the kind of metric you're interested in collecting. To get a list of what count_names are available in that table in your SQL Server, once you access your server from powershell's sqlcmd, you can run the following or similar query (just know that it will give you a very long list indeed):
1> SELECT counter_name, instance_name, cntr_value, cntr_type FROM sys.dm_os_performance_counters;
From there you can pick out the counter_names that are most interesting to you, add them to your custom metric section of the
sqlserver.yaml in the "counter_name" options, and give your metric an appropriate name in the "- name:" options (you may want to start them with "
sqlserver." like all the other sqlserver metrics).
An example of what your sqlserver.yaml might look like if you wanted to collect metrics for the CLR Execution, Queued requests, and Active requests properties is as follows:
- name: sqlserver.clr.execution
counter_name: CLR Execution
- name: sqlserver.requests.queued
counter_name: Queued requests
- name: sqlserver.requests.active
counter_name: Active requests
- host: 127.0.0.1,1433