issue_comments: 693475844

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https://github.com/pydata/xarray/issues/4428#issuecomment-693475844 https://api.github.com/repos/pydata/xarray/issues/4428 693475844 MDEyOklzc3VlQ29tbWVudDY5MzQ3NTg0NA== 2448579 2020-09-16T15:17:44Z 2020-09-16T15:17:44Z MEMBER

This looks like a consequence of https://github.com/dask/dask/pull/6514 . That change helps with cases like https://github.com/pydata/xarray/issues/4112

sortby is basically an isel indexing operation; so dask is automatically rechunking to make chunks with size < the default. You could fix this by setting an appropriate value in array.chunk-size either temporarily or permanently

python with dask.config.set({"array.chunk-size": "256MiB"}): # or appropriate value ...

 
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