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From:Kevin Burton Date:May 9 2005 5:45pm
Subject:Re: MySQL not using optimum disk throughput.
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Greg Whalin wrote:

>
> Curious, were you seeing deadlocks in Suns JVM w/ Tomcat?

Never with Tomcat but we might have a different number of threads.  But 
it *was* with Java...

> We were forced to run Tomcat w/ NPTL off due to deadlocks under glibc 
> 2.3.2+NPTL.  

Yup.. thats the problem we had.  But we have too many threads so 
Linuxthreads fell down.

It sounds like upgrading your glibc would fix this issue.

> Under FC2, the JVM runs fine w/ NPTL, though glibc is now 2.3.3.  

I think this particular bug was fixed in 2.3.3 but there are other 
interesting bugs fixed in 2.3.4 so we went that route.  That and Debian 
has no 2.3.3 build.

> We have had no NPTL issues w/ the x86 version of mysql, but the x86-64 
> definite almost immediate deadlock (w/ 2.3.2).
>
Yeah.. these should related.  I mean its a race condition so the 
processor or schedulre might affect it.

So... this might be another Opteron issue that we've solved :)

I'd be interested in finding out if the switch fixes this issue..

Kevin

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Thread
MySQL not using optimum disk throughput.Kevin Burton6 May
  • Re: MySQL not using optimum disk throughput.Dan Nelson7 May
RE: MySQL not using optimum disk throughput.Dathan Pattishall7 May
  • Re: MySQL not using optimum disk throughput.Greg Whalin7 May
    • Re: MySQL not using optimum disk throughput.Kevin Burton7 May
      • Re: MySQL not using optimum disk throughput.Greg Whalin7 May
        • Re: MySQL not using optimum disk throughput.Kevin Burton7 May
          • Re: MySQL not using optimum disk throughput.Kevin Burton7 May
            • Re: MySQL not using optimum disk throughput.Greg Whalin7 May
              • Re: MySQL not using optimum disk throughput.Kevin Burton7 May
                • Re: MySQL not using optimum disk throughput.Atle Veka7 May
                  • Re: MySQL not using optimum disk throughput.Kevin Burton7 May
                    • Re: MySQL not using optimum disk throughput.Atle Veka7 May
                  • Re: MySQL not using optimum disk throughput.Dan Nelson8 May
              • Re: MySQL not using optimum disk throughput.Peter Zaitsev7 May
                • Re: MySQL not using optimum disk throughput.Greg Whalin7 May
                  • Re: MySQL not using optimum disk throughput.Peter Zaitsev1 Jun
                    • RE: MySQL not using optimum disk throughput.Richard Dale1 Jun
        • Re: MySQL not using optimum disk throughput.Kevin Burton9 May
          • Re: MySQL not using optimum disk throughput.Greg Whalin9 May
            • Re: MySQL not using optimum disk throughput.Kevin Burton9 May
              • Re: MySQL not using optimum disk throughput.Greg Whalin9 May
                • Re: MySQL not using optimum disk throughput.Kevin Burton9 May
Re: MySQL not using optimum disk throughput.John David Duncan7 May
  • Re: MySQL not using optimum disk throughput.Peter Zaitsev7 May