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From Sudha Ponnaganti <sudha.ponnaga...@citrix.com>
Subject RE: [DISCUSS] Management Server Memory Requirements
Date Thu, 21 Feb 2013 05:03:25 GMT
I think we need to investigate why we need more memory before increasing requirements.  Would
below data points provide that kind of info??
 

-----Original Message-----
From: Marcus Sorensen [mailto:shadowsor@gmail.com] 
Sent: Wednesday, February 20, 2013 8:41 PM
To: cloudstack-dev@incubator.apache.org
Subject: RE: [DISCUSS] Management Server Memory Requirements

Thanks. Looks like test servers are 1GB. And there is swapping. Can you run "vmstat 1" and
give us 30 seconds of output?

So we need to decide as a dev team if we need to raise minimum requirements and/or lower java
process memory according to what new 4.1 code can get away with.
On Feb 20, 2013 9:27 PM, "Sailaja Mada" <sailaja.mada@citrix.com> wrote:

> Hi,
>
> Cloudstack Java process statistics are given below when it stops 
> responding are given below :
>
> top - 09:52:03 up 4 days, 21:43,  2 users,  load average: 0.06, 0.05, 0.02
> Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
> Cpu(s):  1.7%us,  0.7%sy,  0.0%ni, 97.3%id,  0.3%wa,  0.0%hi,  0.0%si,  
> 0.0%st
> Mem:   1014860k total,   947632k used,    67228k free,     5868k buffers
> Swap:  2031608k total,   832320k used,  1199288k free,    26764k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 12559 cloud     20   0 3159m 744m 4440 S  2.3 75.1   6:38.39 java
>
> Thanks,
> Sailaja.M
>
> -----Original Message-----
> From: Marcus Sorensen [mailto:shadowsor@gmail.com]
> Sent: Thursday, February 21, 2013 9:35 AM
> To: cloudstack-dev@incubator.apache.org
> Subject: Re: [DISCUSS] Management Server Memory Requirements
>
> Yes, these are great data points, but so far nobody has responded on 
> that ticket with the information required to know if the slowness is 
> related to memory settings or swapping. That was just a hunch on my 
> part from being a system admin.
>
> How much memory do these systems have that experience issues? What 
> does /proc/meminfo say during the issues? Does adjusting the 
> tomcat6.conf memory settings make a difference (see ticket comments)? 
> How much memory do the java processes list as resident in top?
> On Feb 20, 2013 8:53 PM, "Parth Jagirdar" <Parth.Jagirdar@citrix.com>
> wrote:
>
> > +1 Performance degradation is dramatic and I too have observed this
> issue.
> >
> > I have logged my comments into 1339.
> >
> >
> > ŠParth
> >
> > On 2/20/13 7:34 PM, "Srikanteswararao Talluri"
> > <srikanteswararao.talluri@citrix.com> wrote:
> >
> > >To add to what Marcus mentioned,
> > >Regarding bug CLOUDSTACK-1339 : I have observed this issue within
> > >5-10 min of starting management server and there has been a lot of 
> > >API requests through automated tests. It is observed that 
> > >Management server not only slows down but also goes down after a while.
> > >
> > >~Talluri
> > >
> > >-----Original Message-----
> > >From: Marcus Sorensen [mailto:shadowsor@gmail.com]
> > >Sent: Thursday, February 21, 2013 7:22
> > >To: cloudstack-dev@incubator.apache.org
> > >Subject: [DISCUSS] Management Server Memory Requirements
> > >
> > >When Javelin was merged, there was an email sent out stating that 
> > >devs should set their MAVEN_OPTS to use 2g of heap, and 512M of 
> > >permanent memory.  Subsequently, there have also been several 
> > >e-mails and issues where devs have echoed this recommendation, and 
> > >presumably it fixed issues. I've seen the MS run out of memory 
> > >myself and applied those recommendations.
> > >
> > >Is this what we want to provide in the tomcat config for a package 
> > >based install as well? It's effectively saying that the minimum 
> > >requirements for the management server are something like 3 or 4 GB 
> > >(to be safe for other running tasks) of RAM, right?
> > >
> > >There is currently a bug filed that may or may not have to do with 
> > >this, CLOUDSTACK-1339. Users report mgmt server slowness, going 
> > >unresponsive for minutes at a time, but the logs seem to show 
> > >business as usual. User reports that java is taking 75% of RAM, 
> > >depending on what else is going on they may be swapping. Settings 
> > >in the code for an install are currently at 2g/512M, I've been 
> > >running this on a 4GB server for awhile now, java is at 900M, but I 
> > >haven't been pounding it with requests or anything.
> > >
> > >This bug might not have anything to do with the memory settings, 
> > >but I figured it would be good to nail down what our minimum 
> > >requirements are for 4.1
> >
> >
>
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