[GitHub] [pinot] ashishkf commented on issue #7973: chunk compression type is hardcoded to passthrough for metric columns

[GitBox <gi...@apache.org>]

ashishkf commented on issue #7973:
URL: https://github.com/apache/pinot/issues/7973#issuecomment-1013535427


   I think in many cases the metric values don't change much - for example cpu usage gauge will have only slight variations for a given metric series over a small interval (say, 10 minutes). We have seen good compression ratios - in our data (storing Kubernetes metrics), we are getting 1 bytes per row instead of 8 allocated for the 'double' column. As a workaround we marked the value column as dimension to get the LZ4 compression to get the savings.


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