samgang opened a new issue, #4658: URL: https://github.com/apache/incubator-seatunnel/issues/4658
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/incubator-seatunnel/issues?q=is%3Aissue+label%3A%22bug%22) and found no similar issues. ### What happened The speed of data synchronization from MySQL to MySQL is very slow. So how should we improve the synchronization speed? Also, is there a preSql function? such as deleting target table data before synchronization ### SeaTunnel Version apache-seatunnel-incubating-2.3.1 ### SeaTunnel Config ```conf env { execution.parallelism = 1 job.mode = "BATCH" } source { Jdbc { url = "jdbc:mysql://localhost:3306/test" driver = "com.mysql.cj.jdbc.Driver" connection_check_timeout_sec = 100 user = "xxxxxx" password = "xxxxxx" query = "select id,name from t1" partition_column = "id" partition_num = 10 } } sink { jdbc { url = "jdbc:mysql://localhost:3306/test" driver = "com.mysql.cj.jdbc.Driver" user = "xxxxxx" password = "xxxxxx" query = "INSERT INTO t2(id,name) VALUES (?,?)" } } ``` ### Running Command ```shell ./bin/seatunnel.sh --config test2.conf -m local ``` ### Error Exception ```log Read Count So Far : 282048 Write Count So Far : 279999 Average Read Count : 233/s Average Write Count : 233/s Last Statistic Time : 2023-04-24 17:33:30 Current Statistic Time : 2023-04-24 17:34:30 Read Count So Far : 295048 Write Count So Far : 292999 Average Read Count : 216/s Average Write Count : 216/s Last Statistic Time : 2023-04-24 17:34:30 Current Statistic Time : 2023-04-24 17:35:30 ``` ### Flink or Spark Version no ### Java or Scala Version 1.8 ### Screenshots _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) -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
