question What does mean AverageThreadTokens in impala's query profile in Archives of Support Questions (Read Only)

What does mean AverageThreadTokens in impala's query profile

fil — Fri, 16 Sep 2022 09:34:19 GMT

Hi dear experts!

does anybodu know what does mean AverageThreadTokens in Impala's query profile?

thanks!

fil — Thu, 16 Jul 2015 03:57:25 GMT

I found in source code:

// Average number of thread tokens for the duration of the plan fragment execution.

// Fragments that do a lot of cpu work (non-coordinator fragment) will have at

// least 1 token. Fragments that contain a hdfs scan node will have 1+ tokens

// depending on system load. Other nodes (e.g. hash join node) can also reserve

// additional tokens.

// This is a measure of how much CPU resources this fragment used during the course

// of the execution.

RuntimeProfile::Counter* average_thread_tokens_;

cjervis — Thu, 16 Jul 2015 12:57:09 GMT

I am happy to see that you found your answer. Thanks for sharing it. 🙂