05-02-2018 03:43 PM
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.
05-02-2018 05:33 PM
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