v4.7 Heap Issues on Apple Silicon

[AndrewDevlin]

Further to this locked thread: How to adjust heap size in v4.7.x?

My system was working well without an explicit heap setting until today. I was able to do all my work as before on the Intel version, but about 50% faster throughput.

Today I tried to update a 95MB Excel file with the Excel Writer node and got a heap error. The heap would extend to ~8GB by itself but no further. My Mac has 32GB of RAM, so I expect that it should/could extend further. Not sure if the built in heap setting has been increased from 2GB to 8GB or not…that’s my best guess.

I was able to work around the issue manually with separate Excel files, but will be good to get a handle on the heap settings as soon as possible.

Thanks – Andrew

[mlauber71]

@AndrewDevlin I would assume you could still set the heap size per change in the knime.ini.

[AndrewDevlin]

Do you mean manually add the line from the old ini file?

[mlauber71]

That would be my suggestion.

[ksimecek]

Hello,

I have Apple ARM CPU and for running KNIME with more RAM I using in KNIME.INI this params:

-Xms8g
-Xmx24g
-XX:ReservedCodeCacheSize=375m

For acceleration string operations I using in KNIME.INI this params:

-XX:+StringDeduplication
-XX:+UseStringDeduplication
-XX:+UseStringCache
-XX:+OptimizeStringConcat

For acceleration Column operations I using in KNIME.INI this params:

-Dorg.knime.container.cellsinmemory=10000000

Well, You can to try it.

I use KNIME for Data analytics in Cyber Security and my tasks need more RAM and CPU speed.

Karel Simecek

[AndrewDevlin]

Update – I added the line

-Xmx24g

to my knime.ini in v4.7 and it fixed my issue. I am now able to address more than 8GB of real memory.

@knime team: this should be added to the closed thread referenced above as a solution as well.