Creating indexes concurrently in MySQL

Question

I found a procedure in pl/sql that creates indexes with multiple threads :

declare l_job number;
begin
    dbms_job.submit( l_job, 'execute immediate ''alter index idx1 rebuild'';' );
    commit;
    dbms_job.submit( l_job, 'execute immediate ''alter index idx2 rebuild'';' );
    commit;
end;

This procedure will be executed in parallel.

Can I write such procedure in MySQL? Can MySQL execute a procedure in a separate thread?

Answer 1

In MySQL you get 1 thread per client connection. To make this parallel, you would need to fire up a client instance for each index you wished to rebuild and run those clients in parallel. This link talks about the limitation at hand: http://www.mysqlperformanceblog.com/2010/10/27/mysql-limitations-part-4-one-thread-per-connection/