On Mar 6, 2013, at 5:57 PM, Noah Watkins <jayh...@cs.ucsc.edu> wrote:

> The MDS process in my cluster is running at 100% CPU. In fact I thought the 
> cluster came down, but rather an ls was taking a minute. There aren't any 
> clients active. I've left the process running in case there is any probing 
> you'd like to do on it:
> 
> virt   res          cpu
> 4629m  88m 5260 S   92  1.1 113:32.79 ceph-mds
> 
> Thanks,
> Noah
> 


This is a ceph-mds child thread under strace. The only thread
that appears to be doing anything.

root@issdm-44:/home/hadoop/hadoop-common# strace -p 3372
Process 3372 attached - interrupt to quit
read(1649, "7f0203235000-7f0203236000 ---p 0"..., 8191) = 4050
read(1649, "7f0205053000-7f0205054000 ---p 0"..., 8191) = 4050
read(1649, "7f0206e71000-7f0206e72000 ---p 0"..., 8191) = 4050
read(1649, "7f0214144000-7f0214244000 rw-p 0"..., 8191) = 4020
read(1649, "7f0215f62000-7f0216062000 rw-p 0"..., 8191) = 4020
read(1649, "7f0217d80000-7f0217e80000 rw-p 0"..., 8191) = 4020
read(1649, "7f0219b9e000-7f0219c9e000 rw-p 0"..., 8191) = 4020
...

That file looks to be:

ceph-mds 3337 root 1649r   REG    0,3    0   266903 /proc/3337/maps

(3337 is the parent process).--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to