Re: [Xen-users] XCP xapi debugging

[George Shuklin <george.shuklin@xxxxxxxxx>]

Good day.

I'm sure host have enough memory (host is about 30GiB memory, every VM
have around 1GiB dynamic-max memory). And main question is how to find
reason, not reason itself. 

I think this part of xapi is very... cloudy - some kind of more detail
report shall be logged to allow find reason of failures.

Ð ÐÑ., 15/10/2010 Ð 09:45 -0400, Vern Burke ÐÐÑÐÑ:
> George:
>     In my experience, 90+% of the time, unexplained failures to start 
> are the result of not enough available memory on the pool master. This 
> is one of the reasons I've put so much effort into the load balancing on 
> XCCS.
> 
> When it happens, try migrating some of the VMs off the pool master and 
> see if that helps.
> 
> Vern Burke
> 
> SwiftWater Telecom
> http://www.swiftwatertel.com
> Xen Cloud Control System
> http://www.xencloudcontrol.com
> 
> 
> On 10/15/2010 8:01 AM, George Shuklin wrote:
> > Good day.
> >
> > Suddenly on pretty high loaded pool with about 50 VM per 5 hosts I got
> > following problem vm does not start and start command silently waiting.
> >
> > xe task-list displays pack of tasks with same status and resident-on:
> >
> > uuid ( RO)                  : b607ef7b-e185-72d9-4d3a-5795557922fc
> >              name-label ( RO): VM.start
> >        name-description ( RO):
> >              subtask_of ( RO):<not in database>
> >                subtasks ( RO):
> >             resident-on ( RO): e9dc1da9-178b-4a98-8dd2-571a920cd4cc
> >                  status ( RO): pending
> >                progress ( RO): 0.000
> >                    type ( RO):<none/>
> >                  result ( RO):
> >                 created ( RO): 20101015T11:03:04Z
> >                finished ( RO): 19700101T00:00:00Z
> >              error_info ( RO):
> >      allowed_operations ( RO): Cancel
> >
> >
> > My next question: how can I know what happens? Where to look next?
> > dmesg, daemon.log, messages does not contain any valuable information.
> >
> > I filter xensource.log but it only contain connection about task
> > querying.
> >
> > How can I found what prevent VM starts?
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
> 
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