There are errors with items such as:

• Buffer cache hit ratio
• Cache Hit Ratio
• Worktables From Cache Ratio

Error happens on preprocessing steps using parameter, for example
**
Code:
$[?(@.counter_name=='WorktablesFromCacheRatio')].cntr_value.first()
it fails with this message:

**

 Preprocessing failed for: [{"object_name":"SQLServer:Access Methods","cntr_value":"828","counter_name":"AU cleanup batches/...

1. Failed: cannot extract value from json by path "$[?(@.counter_name=='WorktablesFromCacheRatio')].cntr_value.first()": no data matches the specified path

 
One can modifies preprocessing steps to:
 

$[?(@.counter_name=='Worktables From Cache Ratio')].cntr_value.first()

Now it get values but I think they are miscalculated: