Hi, I have 2 DB server, running as master and slave. I just add an index to one of my table on master, it took about 12 minutes. During adding the index, I have insert/update queries to other tables. On master this has no problem at all. The problem is, on slave these queries were blocked by the previous 12 minutes query. Does this mean that there is only 1 thread to run the SQL from master? Can this be set to multithread? Thank you very much.
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