Drastically reduce cardano-node memory usage by setting RTS params

Since most heap in use by cardano-node is long-lived stuff, passing the +RTS -c -RTS should result in roughly half the memory usage that cardano-node is currently using.

It might be possible to reduce memory usage further by setting -F1.5, but I’m not sure about that one.

Also: CPU usage is usually high when running Daedalus. I think it would be wise to set -I0 (no idle GCs) or setting -Iw600, idle GC only every 10 minutes, for the cardano-node process.

For reference:

https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/runtime_control.html#rts-options-to-control-the-garbage-collector

Personally I’d maybe also increase the generations.

But long story short: I think cardano-node memory usage can be drastically reduced by simply setting some RTS params. Currently I do not know how to pass RTS parameters to cardano-node from Daedalus.

[dmitrii-gaico]

Thank you all for the participation and feedback. Daedalus 4.8.0 had been released and includes the RTS Mode feature. For now we decided to stick with “-c” option only even it is showing not the best ram usage reduction. However based on our testing results “-c” is the safest option for the Node stability. Other flag combinations showed better ram usage improvements but unfortunately the Node started to work unstable. If you are able to find a combination which is showing better ram usage and Node stability is not affected please feel free to open a new card and share your findings. It would be much appreciated. For now I’m closing the current ticket.

[weebl2000]

@dmitrii-gaico I think this was implemented in Daedalus 4.8 - do we want to close this or keep it open for looking into further RTS param tuning? I’d be open to help out with that.