unreal-asr opened a new issue, #56700:
URL: https://github.com/apache/doris/issues/56700

   ### Search before asking
   
   - [x] I had searched in the 
[issues](https://github.com/apache/doris/issues?q=is%3Aissue) and found no 
similar issues.
   
   
   ### Version
   
   Apache Doris 3.1.1 vs Apache Doris 3.0.8 
   
   ### What's Wrong?
   
   In a compared test with 
   
   - same java jdbc client with batch insert
   -  same data to insert 
   - same table filed and index
   - same target enviroment and hardware 
   
   with the following connection string:
   
   - 
useServerPrepStmts=false&useLocalSessionState=true&rewriteBatchedStatements=true&cachePrepStmts=true&prepStmtCacheSqlLimit=1048576&prepStmtCacheSize=500&sessionVariables=group_commit=async_mode,enable_nereids_planner=true,time_zone=UTC,enable_prepared_stmt_audit_log=false
   
   Table definition is the same with the only difference in the core field and 
1 properties:
   
   data VARIANT<properties("variant_max_subcolumns_count" = "2048")> NOT NULL
   and "inverted_index_storage_format" = "V3"
   
   In Apache Doris 3.0.8 I can insert 900 row batch with 1600 json field etach 
row in few second (2s) now more than 15s. 
   It seams that  group_commit=async_mode it not working.
   The Java client does not immediately return control but waits several 
seconds causing a decrease in throughput and the inability to utilize hardware 
resources that ramain low. 
   
   
   ### What You Expected?
   
   I expected a performance increase based on what was described in the release 
notes
   
   https://doris.apache.org/docs/dev/releasenotes/v3.1/release-3.1.0
   
   ### How to Reproduce?
   
   _No response_
   
   ### Anything Else?
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [x] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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