When we querying mysql database using presto, is it means that we still using mysql’s resource like cpu or ram or not?. Thank you
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This from the faq explain your question
If the Presto process is mostly idle, this means that Presto can not retrieve data fast enough from the HDFS data node. This could be caused by network or disk bandwidth or CPU on the data node.
As you see presto is a separate process that waits that the database sends the requested data. so the database has to "work" as normal
于 2021-05-31T10:37:33.213 回答