The table has the Composite Primary Key will be very slow while using Dumpling to backup in MySQL #29386
Labels
component/dumpling
This is related to Dumpling of TiDB.
severity/major
type/bug
The issue is confirmed as a bug.
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
I found that logical backup is very slow while using Dumping in MySQL.
2. What did you expect to see? (Required)
While meeting the column which is not an integer in the first column in Composite Primary Key just like Mydumper. Don't use the integer column to split chunks.
3. What did you see instead (Required)
Dumpling will use the integer column to split chunks.
Just like :
4. What is your TiDB version? (Required)
Mysql: 5.7.27
Dumpling : v4.0.10 and v5.2.0
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