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Posted to issues@arrow.apache.org by "Philipp Moritz (JIRA)" <ji...@apache.org> on 2018/08/01 00:15:00 UTC

[jira] [Created] (ARROW-2953) [Plasma] Store memory usage

Philipp Moritz created ARROW-2953:
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             Summary: [Plasma] Store memory usage
                 Key: ARROW-2953
                 URL: https://issues.apache.org/jira/browse/ARROW-2953
             Project: Apache Arrow
          Issue Type: Improvement
            Reporter: Philipp Moritz


While doing some memory profiling on the store, it became clear that at the moment the metadata of the objects takes up much more space than it should. In particular, for each object:
 * The object id (20 bytes) is stored three times
 * The object checksum (8 bytes) is stored twice
 * data_size and metadata_size (each 8 bytes) are stored twice

We can therefore significantly reduce the metadata overhead with some refactoring.



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