Re: [Hawkular-dev] Memory-usage of Hawkular-services

On 11 Oct 2016, at 8:42, Heiko W.Rupp wrote: Looks like we are making some progress - metric forwarding to alerts seems to do some memory-wise heavy work, that can be reduced (hwkmetrics-507 and -508 and hawkular-1130 iirc) - internal hsqldb uses a lot of memory - that is "only" a developer concern - using postgres does not exhibit the memory usage for caching as does hsqldb, but - the postgres driver in inventory (v...1201) seems to use finalizers too much - we are investigating to use a newer driver that may perform better I just replaced in a local copy inventory 0.20 with 0.19.3 and this seems to be smoother sailing - a lot less finalizers that also hold less memory. I did try to run with -XX:+UseStringDeduplication which requires -XX:+UseG1GC, but according to MAT it did not have an effect for me. We may want to look into string interning for the future like we did in JON.