[Gluster-users] gluster's cpuload is too high on specific birck daemon

[공용준(yongjoon kong)/Cloud Computing 기술담당/SKCC]

Here's my result of strace -f -c -p glusterPID


Process 1993 detached
Process 1994 detached
Process 1996 detached
Process 2004 detached
Process 2006 detached
Process 2013 detached
Process 3469 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 38.39   23.261809       11899      1955        86 lgetxattr
 28.31   17.155779       35667       481        52 futex
 16.58   10.046922       70258       143           epoll_wait
 15.33    9.292713      929271        10           nanosleep
  1.36    0.826873      826873         1           restart_syscall
  0.01    0.007801          51       154           getdents
  0.00    0.002299           4       572           readv
  0.00    0.002176           1      1787           lstat
  0.00    0.001078          90        12           read
  0.00    0.000896           6       141           writev
  0.00    0.000472           3       142           lseek
  0.00    0.000207           2       126           clock_gettime
  0.00    0.000194          49         4           munmap
  0.00    0.000079           4        22           fcntl
  0.00    0.000000           0        26           open
  0.00    0.000000           0        25           close
  0.00    0.000000           0        20           stat
  0.00    0.000000           0         4           fstat
  0.00    0.000000           0         4           mmap
  0.00    0.000000           0         4           statfs
------ ----------- ----------- --------- --------- ----------------
100.00   60.599298                  5633       138 total


-----Original Message-----
From: Pavan T C [mailto:tcp at gluster.com] 
Sent: Wednesday, July 27, 2011 6:18 PM
To: 공용준(yongjoon kong)/Cloud Computing 기술담당/SKCC
Cc: gluster-users at gluster.org
Subject: Re: [Gluster-users] gluster's cpuload is too high on specific birck daemon

On Wednesday 27 July 2011 01:45 PM, 공용준(yongjoon kong)/Cloud 
Computing 기술담당/SKCC wrote:
> Hello,
>
> I'm gluster with distributed-replicated mode(4 brick server)
>
> And 10client server mount gluster volume brick1 server. ( mount -t glustefs brick1:/volume /mnt)
>
> And there's very strange thing.
>
> The brick1's cpu load is too high. From 'top' command, it's over 400%
> But other brick's load is too low.

It is possible that an AFR self heal is getting triggered.
On the brick, run the following command:

strace -f -c -p <glusterfs.pid>

and provide the output.

Pavan

>
> Is there any reason for this? Or Is there anyway tracking down this issue?
>
> Thanks.
>
>
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