[Gluster-users] Really long df-h and high swap usage after rsync 3.7.11

Marco Lorenzo Crociani marcoc at prismatelecomtesting.com
Wed Jul 20 09:46:34 UTC 2016


Hi,
I have a CentOS7 with rsnapshot that mount glusterfs volume and do 
backups every day.

# yum list installed |grep glusterfs
glusterfs.x86_64                       3.7.11-1.el7
glusterfs-api.x86_64                   3.7.11-1.el7
glusterfs-client-xlators.x86_64        3.7.11-1.el7
glusterfs-fuse.x86_64                  3.7.11-1.el7
glusterfs-libs.x86_64                  3.7.11-1.el7

# free -m
               total        used        free      shared buff/cache   
available
Mem:           7958        3401         213           4 4343        4146
Swap:          8063        2467        5596


After running the backups df -h is really slow:

# time df -h
File system                   Dim. Usati Dispon. Uso% Montato su
[.....]
s25gfs.ovirt:VOL_***          100G   40G     61G  40% /mnt/VOL_***
s25gfs.ovirt:VOL_***         100G   50G     51G  50% /mnt/VOL_***
s25gfs.ovirt:VOL_***        200G  138G     63G  69% /mnt/VOL_***
s25gfs.ovirt:VOL_***         500G  412G     89G  83% /mnt/VOL_***
s25gfs.ovirt:VOL_***          500G  246G    255G  50% /mnt/VOL_***
s25gfs.ovirt:VOL_***     200G   98G    103G  49% /mnt/VOL_***
s25gfs.ovirt:VOL_***        200G   90G    111G  45% /mnt/VOL_***
s25gfs.ovirt:VOL_***      100G   43G     58G  43% /mnt/VOL_***
s25gfs.ovirt:VOL_***        500G  385G    116G  77% /mnt/VOL_***
s25gfs.ovirt:VOL_***     100G   52G     49G  52% /mnt/VOL_***
s25gfs.ovirt:VOL_***        100G   15G     86G  15% /mnt/VOL_***
s25gfs.ovirt:VOL_***   400G  348G     53G  87% /mnt/VOL_***

real    0m24.068s
user    0m0.003s
sys    0m0.002s

while on another machine it took:
real    0m0.057s
user    0m0.000s
sys    0m0.006s

after umounting all gluster volumes and mounting those back:

# free -m
               total        used        free      shared buff/cache   
available
Mem:           7958         652        3014           4 4291        6915
Swap:          8063          55        8008

time df -h
real    0m0.037s
user    0m0.001s
sys    0m0.002s

I mount the volumes in fstab with:
s25gfs.ovirt:VOL_***            /mnt/VOL_*** glusterfs       
defaults,acl        0 0

Is there any memory leak or something nasty?
Regards,

-- 
Marco Crociani
Prisma Telecom Testing S.r.l.
via Petrocchi, 4  20127 MILANO  ITALY
Phone:  +39 02 26113507
Fax:  +39 02 26113597
e-mail:  marcoc at prismatelecomtesting.com
web:  http://www.prismatelecomtesting.com

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