[GitHub] [skywalking] wu-sheng commented on issue #6703: The Java Agent may cause frequent GC or OOM in extreme scenarios

[GitBox <gi...@apache.org>]

wu-sheng commented on issue #6703:
URL: https://github.com/apache/skywalking/issues/6703#issuecomment-814871986


   Let's talk about this from a different perspective.
   > So how SkyWalking Java Agent can do in such extreme scenarios? Because the application availability is very important, all of us won't hope the APM instrument occupies a lot of memory.
   
   SkyWalking agent would provide a unlimited size of spans per segment, you could find the configuration in the agent, it would be 300 spans per segment mostly.
   
   > I wonder why put the segment in the ring buffer, could we put the span? I don't familiar with the Segment design purpose.
   
   If you don't have this concept, you can't tell the links(metrics) between entry span and exit spans, such as one day, we may need N database operations per HTTP request. Also, your codes actually cache much more data than we did for tracing the context.
   **Unless, like in your case**, I would say you must put the parameter collection by yourself. 


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