xinyiZzz opened a new pull request, #10936: URL: https://github.com/apache/doris/pull/10936
# Proposed changes Issue Number: close #10935 ## Problem Summary: ### Solution In the strict memory usage mode of `STRICT_MEMORY_USE=ON`, when the capacity of the vectorized Hash Table is greater than 2G, it starts to grow when 75% of the capacity is satisfied. STRICT_MEMORY_USE=ON` expects BE to use less memory, and gives priority to ensuring stability when the cluster memory is limited. ### Future In the future, expect a dynamic soft memory limit, combined with real-time memory usage of the cluster, to control the main memory consumers, including HashTable, LRU Cache elimination strategy, ChunkAllocator cache strategy, Disk IO buffer cache strategy, etc. ### Motivation Currently, the vectorized Hash Table starts to grow when it is half full. This is good for performance, but will use more memory. Compared with performance, some production environments are more sensitive to stability. When the cluster memory is insufficient, it is hoped to sacrifice performance to ensure stability. ## Checklist(Required) 1. Does it affect the original behavior: (No) 2. Has unit tests been added: (No) 3. Has document been added or modified: (Yes/No/No Need) 4. Does it need to update dependencies: (No) 5. Are there any changes that cannot be rolled back: (No) ## Further comments If this is a relatively large or complex change, kick off the discussion at [d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you chose the solution you did and what alternatives you considered, etc... -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
