[Gluster-users] Client load high (300) using fuse mount

Pranith Kumar Karampuri pkarampu at redhat.com
Tue Jun 2 05:33:52 UTC 2015

hi Mitja,
          Could you please give output of the following commands:
1) gluster volume info
2) gluster volume profile <volname> start
3) Wait while the CPU is high for 5-10 minutes
4) gluster volume profile <volname> info > 

4th command tells what are the operations that are issued a lot.


On 06/01/2015 04:41 PM, Mitja Mihelič wrote:
> Hi!
> I am trying to set up a Wordpress cluster using GlusterFS used for 
> storage. Web nodes will access the same Wordpress install on a volume 
> mounted via FUSE from a 3 peer GlusterFS TSP.
> I started with one web node and Wordpress on local storage. The load 
> average was constantly about 5. iotop showed about 300kB/s disk reads 
> or less. The load average was below 6.
> When I mounted the GlusterFS volume to the web node the 1min load 
> average went over 300. Each of the 3 peers is transmitting about 
> 10MB/s to my web node regardless of the load.
> TSP peers are on 10Gbit NICs and the web node is on a 1Gbit NIC.
> I'm out of ideas here... Could it be the network?
> What should I look at for optimizing the network stack on the client?
> Options set on TSP:
> Options Reconfigured:
> performance.cache-size: 4GB
> network.ping-timeout: 15
> cluster.quorum-type: auto
> network.remote-dio: on
> cluster.eager-lock: on
> performance.stat-prefetch: off
> performance.io-cache: off
> performance.read-ahead: off
> performance.quick-read: off
> performance.cache-refresh-timeout: 4
> performance.io-thread-count: 32
> nfs.disable: on
> Regards, Mitja

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