[GitHub] [incubator-doris] kangpinghuang opened a new issue #1852: memory is wasted heavily when init segment group

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

kangpinghuang opened a new issue #1852: memory is wasted heavily when init segment group
URL: https://github.com/apache/incubator-doris/issues/1852
 
 
   When init segment group, it will init the zone map and create WrapperField to manage the zone map's min/max. Now WrapperField use Arena to allocate dynamic memory for string type.
   When Arena's allocate() is called, it will directly new a BLOCK_SIZE(4k) memory, without considering the real required memory size.
   So when BE started and during initialization process, memory will be used heavily be WrapperField.
   This should be optimized.

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