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25 lines
1.8 KiB
Text
[role="xpack"]
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[[apm-bottlenecks]]
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== Visualizing Application Bottlenecks
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Elastic APM captures different types of information from within instrumented applications:
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* {apm-overview-ref-70}/transaction-spans.html[*Spans*] contain information about a specific code path that has been executed.
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They measure from the start to end of an activity,
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and they can have a parent/child relationship with other spans.
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* {apm-overview-ref-70}/transactions.html[*Transactions*] are a special kind of span that have extra metadata associated with them.
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You can think of transactions as the highest level of work you’re measuring within a service.
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As an example, a transaction could be a request to your server, a batch job, or a custom transaction type.
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* {apm-overview-ref-70}/errors.html[*Errors*] contain information about the original exception that occurred or about a log created when the exception occurred.
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Each of these information types have a specific page associated with them in the APM app.
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These various pages display the captured data in curated charts and tables that allow you to easily compare and debug your applications.
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For example, you can see information about response times, requests per minute, and status codes per endpoint.
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You can even dive into a specific request sample and get a complete waterfall view of what your application is spending its time on.
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You might see that your bottlenecks are in database queries, cache calls, or external requests.
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For each incoming request and each application error,
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you can also see contextual information such as the request header, user information,
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system values, or custom data that you manually attached to the request.
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Having access to application-level insights with just a few clicks can drastically decrease the time you spend debugging errors, slow response times, and crashes.
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