kaijchen opened a new pull request, #36477:
URL: https://github.com/apache/doris/pull/36477

   ## Proposed changes
   
   Previously, `batch_size` is not set in `query_options` for broker load jobs. 
It will fallback to `4062` on BE.
   This causes performance issues when there are many tablets. Each memtable 
write is too small (1-2 rows).
   
   This PR introduces a new FE config `load_loading_task_batch_size` for broker 
load task/export task/update coordinator.
   And the default batch size for those tasks are increased to `64000`.
   


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