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jordanp98 avatar image
jordanp98 asked Erick Ramirez commented

Is it ok to clean OS cache memory on a DSE Search node?

Post running spark jobs os cache memory of cassandra server increases heavily and not getting reduced automatically when i checked i found that buffer/cache is using 10 GB memory i have clean up same using ubuntu drop cache method. ( sync; sudo sh -c "echo 1 > /proc/sys/vm/drop_caches;sync";sudo sh -c "echo 2 > /proc/sys/vm/drop_caches;sync";sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"/ ).

is it okay to clean up os cache on cassandra node ?

Not cleaning this causes outofmemory issue after few days , but cache cleanup working as workaround for this.

Could you please guide about best practices about the same.

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Erick Ramirez avatar image
Erick Ramirez answered Erick Ramirez commented

Dropping the OS cache is a temporary fix and you need to investigate further to see if there's an underlying problem in your environment.

I suggest logging a ticket with DataStax Support so one of our engineers can have a look. Cheers!

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jordanp98 avatar image jordanp98 commented ·

thanks @Erick Ramirez

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Erick Ramirez avatar image Erick Ramirez ♦♦ jordanp98 commented ·

Not a problem. Cheers!

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