Gluster users - Dec 2012 - Gluster machines slowing down over time

I have 2 gluster servers in replicated mode on EC2 with ~4G RAM
CPU and RAM look fine but over time the system becomes sluggish,
particularly networking.
I notice when sshing into the machine takes ages and running remote
commands with capistrano takes longer and longer.
Any kernel settings people typically use?

Thanks,
Tom
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Have you used top or htop to see if it's CPU use, by what?

Whit

On Tue, Dec 11, 2012 at 04:13:15PM +0000, Tom Hall
wrote:
> I have 2 gluster servers in replicated mode on EC2 with ~4G RAM
> CPU and RAM look fine but over time the system becomes sluggish,
particularly
> networking. 
> I notice when sshing into the machine takes ages and running remote
commands
> with capistrano takes longer and longer.
> Any kernel settings people typically use?
> 
> Thanks, 
> Tom
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://supercolony.gluster.org/mailman/listinfo/gluster-users

> > On Tue, Dec 11, 2012 at 04:13:15PM +0000, Tom Hall wrote:
> > I notice when sshing into the machine takes ages and running remote
commands
> > with capistrano takes longer and longer.
 That is commonly related to DNS unavailability or misconfiguration.
What makes you think the slowness is gluster-related?

Regards

On Tue, Dec 11, 2012 at 04:13:15PM +0000, Tom Hall
wrote:
>    I have 2 gluster servers in replicated mode on EC2 with ~4G RAM
> 
>    CPU and RAM look fine but over time the system becomes sluggish,
>    particularly networking.
> 
>    I notice when sshing into the machine takes ages and running remote
>    commands with capistrano takes longer and longer.
Do you have swap configured? Is the system going into swap?

Have a look at output of "free", "vmstat 5" (for a minute or
two),
"iostat 5 -x" (ditto)

You may need to install the "sysstat" package to get iostat.

On Tue, Dec 11, 2012 at 4:40 PM, s19n <mailbox at s19n.net> wrote:
> > > I notice when sshing into the machine takes ages and running
remote
> commands
> > > with capistrano takes longer and longer.
>
>  That is commonly related to DNS unavailability or misconfiguration.
> What makes you think the slowness is gluster-related?

Does not explain why restarting the machines makes it faster again, I
suspect gluster because that is all the machine is doing and I didnt do
much performance tweaking and dont really know gluster so well.

Tom
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