[GitHub] franz1981 edited a comment on issue #2494: ARTEMIS-2224 Reduce contention on LivePageCacheImpl

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franz1981 edited a comment on issue #2494: ARTEMIS-2224 Reduce contention on LivePageCacheImpl
URL: https://github.com/apache/activemq-artemis/pull/2494#issuecomment-454709952
 
 
   @qihongxu 
   What is worrying me is this
   > at most time it obtained a 3k~6k tps
   
   If the same test (same configuration) is performed using just 1 consumer I'm expecting (best case scenario) that it would have (3k-6k)/200 tps if:
   
   1.  the tps are dependent by the most demanding operation in the CPU flamegraph you've posted 
   ie `ConcurrentAppendOnlyList:.get(index)`
   2. the `ConcurrentAppendOnlyList:.get(index)` can now happen in parallel and assuming to have 200 threads available it means a 200 x speedup
   
   I suppose that 2 can't be true, so it really depends on the number of cores/threads available to execute such queries to `LivePageCache` IF such queries are performed in parallel.
   Do you have any idea of what's happening here? Which assumptions are correct/wrong?
   Just guessing if this process could be made much better/scalable just answering those questions :+1: 

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