perfSONAR User Q&A and Other Discussion

[Larry Blunk <>]

On 10/13/2017 02:32 PM, Andrew Lake wrote:

Hi Casey,

You might want to try the 4.0.2 beta on one or more of the problematic hosts. It has quite a few performance fixes, in particular with respect to the CPU usage of archiving which in turn leads to lots of other things breaking. On some of our lower-powered hosts and small nodes we have definitely seen problems with limit timeouts like you are seeing in 4.0.1 and then when we put the beta on there they went away. If you want to try the beta run the following:

yum install perfSONAR-repo-staging

yum clean all

yum update

Once the final is out you may want to do a “yum remove perfSONAR-repo-staging” if you don't want those hosts to automatically get future beta versions.

Thanks,

Andy

  Has anyone experienced Apache hitting the MaxClients limit and hanging?   We've had this happen on several boxes
since upgrading to 4.01.   We've had to restart Apache to get them functioning again.  We've upped the
MaxClients limit on them, but it still occurs even after doubling the setting to 512.   These are high perfomance
boxes, so it doesn't seem like it should be a CPU issue.

 -Larry Blunk
  Merit