Is there a way I can monitor slow queries on the database and discover which code originated this slow query?
I can see some queries on the Database section and get some information from PurePath on Transactions and Services, but I can't seem to find a way to know where the query was generated, like a complete stacktrace that shows which files (and which line) generated this query (I'm running a PHP application).
Is it possible to discover that with Dynatrace?
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This should be possible by performing a "Service Backtrace" within Dynatrace. See more on that here: https://www.dynatrace.com/support/help/shortlink/service-backtrace and here: https://www.dynatrace.com/support/help/shortlink/database-services#database-service-backtrace
More on how Dynatrace detects the database activity here: https://www.dynatrace.com/support/help/shortlink/database-detection
As your question relates to our Dynatrace SaaS and Managed offerings, I'll move this question to the appropriate forum. (Because "AppMon & UEM Q&A" relates to one of our classic products.)
In Dynatrace you don't get it at the Purepath level, even when seen in "Code level". But given that PHP is (normally) interpreted, it might be possible. So probably this might be better considered an RFE.
It's a different case in errors, where that information is available:
Actually, you can do something similar, wont give you the exact line of code, but you can see purepath:
or an overall of all the calls and add a filter for calls to an specific DB and specific response time:
From there you can see the callstack or even download the source. The only thing that wont showup is the code line i think.