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xelabs / go-mydumper

A multi-threaded MySQL backup and restore tool, faster than mysqldump

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go-mydumper some problems

Dragonzlx opened this issue · comments

commented

Hi, i am using go-mydumper in mysql 8.0.19 group replication， it failed to restore a table with 70M, i check the mysql error log, it seems too much memory when go-mydumper to restore, so it lead to mysql out of memory, and lead to node kick out from the cluster, there is some suggestion on below:

  1. myloader consumes too much memory to restore from a backup
  2. it should be better to add parallel options to backup
commented
  1. Need to determine who use the the memory first, go-mydumper is streaming fetch, it's memory efficent.
  2. go-mydumper is parallel based on database