Large data tables missing?

[mlauber71]

Will the large dataset be imported and the problems will occur later or do you experience problems also when loading data? If you have problems with import it might help to use the R library Readr instead of KNIME file reader.

I know of no formal restriction for data in KNIME but it depends on how much power your system might bring. These points might be able to help you

• check out the links below with hints from KNIME and other information about performance
• with large datasets from CSV it might be worth having a separate workflow that stores them in a KNIME table or split up tasks into several workflows
• check the memory handling of critical nodes
• try to use the Parquet internal compression and see if that bringt any help
• then if mit comes to execution you might check if streaming is an option for you only to process several lines at once (of course if you need to do joint that might not be possible)
  (https://nodepit.com/workflow/public-server.knime.com%3A80%2F06_Control_Structures%2F01_Meta_Nodes_and_Wrapped_Nodes%2F01_Simple_Streaming_and_Wrapped_Nodes)
• if you have a lot of large strings it could be possible to replace them with a dictionary and only deal with (long) integers - only if that fits your task

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KNIME performance

Optimizing KNIME workflows for performance | KNIME

Knime 3.6 Crash when dealing with massive data

you could try and increase the assigned memory in the knime.ini configuration file but with only 4 GB there are limits to that (https://www.knime.com/blog/optimizing-knime-workflows-for-performance). On other option is to set the “Memory Policy” of the (sorter) node to “Write tables to disc”. Obviously this increases the load on the hard drive but it might save on RAM. [image] Also you could try and close other workflows, restart KNIME an try to use the garbage collector. [image] [image] T…

KNIME Takes Long to Load?

You might want to check your virus scanner. On certain systems with quite aggressive virus scanners I experienced KNIME to be slow. Since it can contain several 1,000 single files an ‘agressive’ virus scanner might scan all of them every time they are accessed/opened. When we changed the settings KNIME started faster. Of course there is a trade off between security and speed. But modern virus scanners might be able to have a flexible configuration. But of course the number of AddOns and the ove…

Knime is slowing down

That is certainly odd. To the best of my knowledge, there haven’t been any recent major changes to KNIME that are known to have a degrading effect on performance. From my experience, the most dominating performance factor in KNIME is the materialization of intermediate data tables on disk. Have you noticed the performance of your hard disk degrading independently of KNIME? While we have some performance improvements for KNIME in the pipeline, here are some small adjustments you can try out: Y…