Le 25 févr. 2014 à 23:25, Michael <[email protected]> a écrit : > Could you do a 'free -h', my eyes don't read bytes :-)
localu@nuage:~# free -h
total used free shared buffers cached
Mem: 4,0G 3,7G 279M 0B 395M 1,8G
-/+ buffers/cache: 1,5G 2,5G
Swap: 1,0G 7,1M 1,0G
;-)
> One limitation has been that you need more memory than the largest file you
> sync, so if you sync a 4 gb file, you will need 4gb ram as it all gets loaded
> into there. This may have been solved with chunked uploads a while back,
> could someone confirm/deny?
Wow!
I don't think we have lot of these file. But I don't know how to test that...
However, the "free -h" showed before were take without any activity. My
"owncloud.log" is flat at this time...
> Owncloud in my installation doesn't use a crazy amount of RAM.
>
> At the risk of sounding rude, here is an explanation of the output of free:
> http://serverfault.com/questions/85470/meaning-of-the-buffers-cache-line-in-the-output-of-free
> The output is often confusing to people who haven't used it much, as it looks
> like all RAM is used. If this isn't the case in your installation, please
> ignore and assume that this link is for someone else looking at the mailing
> list without this knowledge :-)
Ok, I understand, It would be better if I read documentation... ;-)
but, elsewere, if 5 users needs 1,5 Gb RAM, what about needed RAM for 50?
>
> Michael
>
>
> On Tue, Feb 25, 2014 at 2:27 PM, Pierre Malard <[email protected]> wrote:
> Le 25 févr. 2014 à 18:07, Nicolas Zedde <[email protected]> a écrit :
> > On 02/25/2014 4:52 PM, Pierre Malard wrote :
> >> We have, since 2 years, an owncloud service on our institute network. Now,
> >> we want to generalize its usage but we have some interrogation about the
> >> best configuration.
> >>
> >> The system works on virtual XEN server with Debian Wheezy. The test
> >> configuration is this:
> >> - 2 CPU (i7)
> >> - RAM : 4096 Mo
> >> - Storage area: NFS mont on a low-cast SAN SATA.
> >>
> >> With about 5 or 6 users, the memory is alway to 90%. So what could be this
> >> charge with 150 or 300 users?
> >>
> >> is it because the IO access to NFS storage is too poor?
> >
> >
> > Memory usage seems very high on your server compared to the number of users.
> > Actually, I checked on an OwnCloud server on my own with roughly the same
> > number of users and found 430MB for RAM Usage.
> > Are you sure you're talking about used memory ? Debian uses cache memory to
> > 90% of the system memory but it's not really used and can be allocated to
> > applications.
> > What does a 'top' command return in your case ? (you have to look at the '
> > -/+ buffer/cache' line)
>
> That's ok, look the mem usage:
> localu@nuage:~# free
> total used free shared buffers cached
> Mem: 4190044 3850664 339380 0 344996 1976800
> -/+ buffers/cache: 1528868 2661176
> Swap: 1048568 7260 1041308
>
> I have increase memory allocated to this virtual machine (first test with 512
> Mb) because we had a lot of strange error messages during synchronizations
> (not enought space left, …). As I saw the CPU usage were also full, I decide
> to gave 2 CPU. Now, the CPU usage is normal.
>
> A explanation of memory usage with only 5 to 7 testings users could be that
> we have 2 ownCloud services: one for production usage and one for testing the
> new versions. The first one is on ownCloud v5.0.14a and the second on on last
> v6.0.1.
>
> All ours user use this repository with all fonctionalities (data storage,
> calandar, …). The disk space allocated is from 500 Mb to 7 Gb per user. Every
> connections are done on our LDAP service.
>
> When I'm take a look with "top", I can see that CPU usage is:
> 1st : apache
> 2nd : mysql
> 3rd : fail2ban
>
> the memory usage top is:
> 1st : clamd
> 2nd : mysql
> 3rd : apache
>
> If I talk about disk performance on my first mail, it's because the
> synchronization can be very hard and our data storage is, actualy, on a low
> Sata SAN. On the past, when we had only 1024 Mb of RAM, I have lots data
> during synchronizations following errors. I don't want ours users have the
> same problem.
>
> So, my question can be:
> If we have a lot of real users (about 50 concurents access to 300 users)
> which is the best configuration to our server?
> - how many CPU dedicated?
> - how many RAM?
> - Sata disks or FC?
>
> If someone have experience...
>
> Regards
>
> --
> Pierre Malard
>
> « La liberté de la presse ne s'use que lorsqu'on ne s'en sert pas ! »
> Slogan du "Canard enchaîné"
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--
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« Si, comme le disait le général de Gaule, la France n'avait pas été la
France... on peut logiquement penser que tous les français auraient été
des étrangers » ;-)
Pierre Dac
|\ _,,,---,,_
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|,4- ) )-,_. ,\ ( `'-'
'---''(_/--' `-'\_)
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