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From:Dan Nelson Date:October 17 2008 2:58pm
Subject:Re: MySQL und dual cores
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In the last episode (Oct 17), Marten Lehmann said:
> we are using MySQL 4.1 and 5 on AMD dual core processors, but I can
> only see one mysqld process on each machine. Since a process is
> always tied to a certain processor, mysqld doesn't seem to make use
> of the second core. As far as I know multiple threads of one process
> would be visible as different processes using the ps command.
> 
> Is mysqld really not using more than one processor core? Or if it
> does, then how can I verify it?

Each thread of a threaded process can run on a different CPU.  Try
connecting to mysql over two sessions and run "SELECT
BENCHMARK(10000000000,1+1);" on both.  If you switch to top you should
see mysqld go to 200% CPU.

-- 
	Dan Nelson
	dnelson@stripped
Thread
MySQL und dual coresMarten Lehmann17 Oct
  • Re: MySQL und dual coresDan Nelson17 Oct
    • RE: MySQL und dual coresbruce17 Oct
      • Re: MySQL und dual cores张斌17 Oct
        • RE: MySQL und dual coresbruce17 Oct
      • Re: MySQL und dual coresDan Nelson17 Oct
        • RE: MySQL und dual coresbruce17 Oct
RE: MySQL und dual coresbruce17 Oct