qiaojialin opened a new pull request, #9621:
URL: https://github.com/apache/iotdb/pull/9621

   Previous:
   concurrent_sub_rawQuery_thread is 8, we use the 
min(concurrent_sub_rawQuery_thread, cpu cores) as sub query thread.
   concurrent_query_thread is 16, we use the min(concurrent_query_thread, cpu 
cores) as concurrent query thread.
   
   Currently:
   concurrent_sub_rawQuery_thread is 0, default is cpu cores, but users could 
change it, which could exceeds the cpu cores.
   concurrent_query_thread is 0, default is cpu cores, but users could change 
it, which could exceeds the cpu cores.
   
   If uses' cpu core is lower than 8, the upgrade has no effect.
   If uses' cpu core is larger than 8, the concurrent_sub_rawQuery_thread will 
be larger(cpu cores).
   If uses' cpu core is larger than 16, the concurrent_query_thread will be 
larger(cpu cores).
   


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