perfSONAR User Q&A and Other Discussion

[Brian Candler <>]

On 12/04/2017 14:45, Andrew Lake wrote:
> Basically you can tweak the MAX_HEAP_SIZE and HEAP_NEWSIZE variables 
> in /etc/cassandra/conf/cassandra-env.sh. It was largely trial and 
> error when I did it, but settled on MAX_HEAP_SIZE=512MB and 
> HEAP_NEWSIZE=256MB. Seemed to work ok in my case, but sure it depends 
> on machine load and otehr stuff, so likely you might have to tweak 
> those some. 

It looks like that has made a good improvement - I'm using a lot less 
swap now. Thank you!

Aside: did you ever look at using influxdb as a backend for perfsonar? 
Perhaps it wasn't around in the early days. However it's highly tuned 
for time-series data, and it compiles down to a standalone binary.

https://docs.influxdata.com/influxdb/v1.2/

See "Concepts > Storage Engine" for some nice detail on the internal 
implementation.

Regards,

Brian.