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Impala (Total TCMalloc Bytes in Use Across Impala Daemons) high usage when no query's are running

New Contributor

Hello,

im facing issues with impalas memory usage,

looking at a chart i can see that memory usage is 4TB but there are querys if stacked is about 100-200Gb

as to my understanding when query have been succesfully compleated memory usage should drop,

can someone help undestand why is the memory not returning.

 

Thank you 

 

1 REPLY 1

What version of Impala are you running? How big is the cluster?

 

Are the queries closed and unregistered? We've seen cases where some clients leave queries open.

 

The first place I usually look to diagnose a memory issue is the /memz?detailed=true page on the Impala debug web UI, that has a lot of useful information. E.g. https://impala-daemon-host:25000/memz?detailed=true

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