JVM issues on Godaddy Virtual Server

[Branden Strickland]

All,

It's been a while since I've worked with OFBIZ but the time has come to
resume working with it.

I know the answer to my question (sort of) but need some guidance from some
good JAVA guys... (YOU!)

Overview:
Godaddy's virtual dedicated servers are setup with virtuoso, they alocate
only the needed memory up to what you have for max (me = 256mb)  This should
be fine as I've gotten a test box with that to run OFBIZ.

I have everything setup; Ant, JDK1.6,ofbiz svn exported.
Centos 5

When I go to do an ant run-install-seed I get:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc but
cleaner for CENT/RHEL products) so that I have:
export JAVA_HOME=/opt/jdk1.6.0_13/jre
PATH=$PATH:$JAVA_HOME/bin
alias java='java -Xms2m -Xmx16m'

I'm told the Xms and Xmx will help lower the memory hogging that java wants
to do, but I'm having little success.  I'm fine with java -version and javac
-version.  So JVM itself is working, but I think it's trying to grab too
much memory that the virtual server core won't grant me at one time.

Has anyone worked this this type of thing?

Thanks!!

[cjhorton]

I could be wrong, but operating on a 256 Mb RAM on the virtual server may be
much different than a PC because of the availability of Virtual Memory on
the HDD. virtual memory.

Have you ran OFBiz this way before?

[BJ Freeman]

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as the startofbiz.sh says. 128megs minimum.
Xms128M -Xmx512M
Ofbiz will not work on a shared server.
there are times it will use 70-90% of the CPU time.

Branden Strickland sent the following on 3/31/2009 9:10 AM:

> All,
>
> It's been a while since I've worked with OFBIZ but the time has come to
> resume working with it.
>
> I know the answer to my question (sort of) but need some guidance from some
> good JAVA guys... (YOU!)
>
> Overview:
> Godaddy's virtual dedicated servers are setup with virtuoso, they alocate
> only the needed memory up to what you have for max (me = 256mb)  This should
> be fine as I've gotten a test box with that to run OFBIZ.
>
> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
> Centos 5
>
> When I go to do an ant run-install-seed I get:
>
> Error occurred during initialization of VM
> Could not reserve enough space for object heap
> Could not create the Java virtual machine.
>
> I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc but
> cleaner for CENT/RHEL products) so that I have:
> export JAVA_HOME=/opt/jdk1.6.0_13/jre
> PATH=$PATH:$JAVA_HOME/bin
> alias java='java -Xms2m -Xmx16m'
>
> I'm told the Xms and Xmx will help lower the memory hogging that java wants
> to do, but I'm having little success.  I'm fine with java -version and javac
> -version.  So JVM itself is working, but I think it's trying to grab too
> much memory that the virtual server core won't grant me at one time.
>
> Has anyone worked this this type of thing?
>
> Thanks!!
>

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[David E Jones-3]

OFBiz will definitely work on a shared server, I've worked with dozens  
of clients who have done that. It isn't too hard to fit half a dozen  
instances on a single low-end (but modern) server, with databases for  
each too. Of course, shared server approaches are as varied as  
holidays around the world and there are many variations where OFBiz  
would not run.

Running in 256M would be pretty tight, even for a low-traffic site. Is  
that the amount of memory available to the OS, or to the JVM? If it is  
the memory available to the OS, and if there is no database also  
running on the box (which would definitely make 256M too little), then  
the -Xmx parameter should be about 2/3 of your memory (the 256M). If  
that is the amount available to the JVM, then set -Xmx to 256M, and -
Xms to the same thing (on a dedicated server no use having Java play  
with expanding and contracting the memory it uses).

-David


On Mar 31, 2009, at 1:44 PM, BJ Freeman wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> as the startofbiz.sh says. 128megs minimum.
> Xms128M -Xmx512M
> Ofbiz will not work on a shared server.
> there are times it will use 70-90% of the CPU time.
>
> Branden Strickland sent the following on 3/31/2009 9:10 AM:
>> All,
>>
>> It's been a while since I've worked with OFBIZ but the time has  
>> come to
>> resume working with it.
>>
>> I know the answer to my question (sort of) but need some guidance  
>> from some
>> good JAVA guys... (YOU!)
>>
>> Overview:
>> Godaddy's virtual dedicated servers are setup with virtuoso, they  
>> alocate
>> only the needed memory up to what you have for max (me = 256mb)  
>> This should
>> be fine as I've gotten a test box with that to run OFBIZ.
>>
>> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
>> Centos 5
>>
>> When I go to do an ant run-install-seed I get:
>>
>> Error occurred during initialization of VM
>> Could not reserve enough space for object heap
>> Could not create the Java virtual machine.
>>
>> I've inserted an alias into my /etc/profile.d/java.sh (same as  
>> bashrc but
>> cleaner for CENT/RHEL products) so that I have:
>> export JAVA_HOME=/opt/jdk1.6.0_13/jre
>> PATH=$PATH:$JAVA_HOME/bin
>> alias java='java -Xms2m -Xmx16m'
>>
>> I'm told the Xms and Xmx will help lower the memory hogging that  
>> java wants
>> to do, but I'm having little success.  I'm fine with java -version  
>> and javac
>> -version.  So JVM itself is working, but I think it's trying to  
>> grab too
>> much memory that the virtual server core won't grant me at one time.
>>
>> Has anyone worked this this type of thing?
>>
>> Thanks!!
>>
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[BJ Freeman]

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sounds like you got it working on shared server, based on my experience
when seems lot less than yours, I don't see how more than one instance
can share when another instance is running 70-90% cpu, at peak times.

I would guess it is like a bare-bones system with out many threads, or
activity.


David E Jones sent the following on 3/31/2009 1:34 PM:

>
> OFBiz will definitely work on a shared server, I've worked with dozens
> of clients who have done that. It isn't too hard to fit half a dozen
> instances on a single low-end (but modern) server, with databases for
> each too. Of course, shared server approaches are as varied as holidays
> around the world and there are many variations where OFBiz would not run.
>
> Running in 256M would be pretty tight, even for a low-traffic site. Is
> that the amount of memory available to the OS, or to the JVM? If it is
> the memory available to the OS, and if there is no database also running
> on the box (which would definitely make 256M too little), then the -Xmx
> parameter should be about 2/3 of your memory (the 256M). If that is the
> amount available to the JVM, then set -Xmx to 256M, and -Xms to the same
> thing (on a dedicated server no use having Java play with expanding and
> contracting the memory it uses).
>
> -David
>
>
> On Mar 31, 2009, at 1:44 PM, BJ Freeman wrote:
>
> as the startofbiz.sh says. 128megs minimum.
> Xms128M -Xmx512M
> Ofbiz will not work on a shared server.
> there are times it will use 70-90% of the CPU time.
>
> Branden Strickland sent the following on 3/31/2009 9:10 AM:
>>>> All,
>>>>
>>>> It's been a while since I've worked with OFBIZ but the time has come to
>>>> resume working with it.
>>>>
>>>> I know the answer to my question (sort of) but need some guidance
>>>> from some
>>>> good JAVA guys... (YOU!)
>>>>
>>>> Overview:
>>>> Godaddy's virtual dedicated servers are setup with virtuoso, they
>>>> alocate
>>>> only the needed memory up to what you have for max (me = 256mb)  This
>>>> should
>>>> be fine as I've gotten a test box with that to run OFBIZ.
>>>>
>>>> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
>>>> Centos 5
>>>>
>>>> When I go to do an ant run-install-seed I get:
>>>>
>>>> Error occurred during initialization of VM
>>>> Could not reserve enough space for object heap
>>>> Could not create the Java virtual machine.
>>>>
>>>> I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc
>>>> but
>>>> cleaner for CENT/RHEL products) so that I have:
>>>> export JAVA_HOME=/opt/jdk1.6.0_13/jre
>>>> PATH=$PATH:$JAVA_HOME/bin
>>>> alias java='java -Xms2m -Xmx16m'
>>>>
>>>> I'm told the Xms and Xmx will help lower the memory hogging that java
>>>> wants
>>>> to do, but I'm having little success.  I'm fine with java -version
>>>> and javac
>>>> -version.  So JVM itself is working, but I think it's trying to grab too
>>>> much memory that the virtual server core won't grant me at one time.
>>>>
>>>> Has anyone worked this this type of thing?
>>>>
>>>> Thanks!!
>>>>

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[David E Jones-3]

What does peak CPU have to do with it? All programs use significant  
CPU time every now and then... but usually not for long periods of  
time. App servers typically don't use much CPU time unless they are  
under heavy load... and if you have sites frequently under heavy load  
then chances are a shared server isn't a good idea anyway. So, what's  
the point?

-David


On Mar 31, 2009, at 4:13 PM, BJ Freeman wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> sounds like you got it working on shared server, based on my  
> experience
> when seems lot less than yours, I don't see how more than one instance
> can share when another instance is running 70-90% cpu, at peak times.
>
> I would guess it is like a bare-bones system with out many threads, or
> activity.
>
>
> David E Jones sent the following on 3/31/2009 1:34 PM:
>>
>> OFBiz will definitely work on a shared server, I've worked with  
>> dozens
>> of clients who have done that. It isn't too hard to fit half a dozen
>> instances on a single low-end (but modern) server, with databases for
>> each too. Of course, shared server approaches are as varied as  
>> holidays
>> around the world and there are many variations where OFBiz would  
>> not run.
>>
>> Running in 256M would be pretty tight, even for a low-traffic site.  
>> Is
>> that the amount of memory available to the OS, or to the JVM? If it  
>> is
>> the memory available to the OS, and if there is no database also  
>> running
>> on the box (which would definitely make 256M too little), then the -
>> Xmx
>> parameter should be about 2/3 of your memory (the 256M). If that is  
>> the
>> amount available to the JVM, then set -Xmx to 256M, and -Xms to the  
>> same
>> thing (on a dedicated server no use having Java play with expanding  
>> and
>> contracting the memory it uses).
>>
>> -David
>>
>>
>> On Mar 31, 2009, at 1:44 PM, BJ Freeman wrote:
>>
>> as the startofbiz.sh says. 128megs minimum.
>> Xms128M -Xmx512M
>> Ofbiz will not work on a shared server.
>> there are times it will use 70-90% of the CPU time.
>>
>> Branden Strickland sent the following on 3/31/2009 9:10 AM:
>>>>> All,
>>>>>
>>>>> It's been a while since I've worked with OFBIZ but the time has  
>>>>> come to
>>>>> resume working with it.
>>>>>
>>>>> I know the answer to my question (sort of) but need some guidance
>>>>> from some
>>>>> good JAVA guys... (YOU!)
>>>>>
>>>>> Overview:
>>>>> Godaddy's virtual dedicated servers are setup with virtuoso, they
>>>>> alocate
>>>>> only the needed memory up to what you have for max (me = 256mb)  
>>>>> This
>>>>> should
>>>>> be fine as I've gotten a test box with that to run OFBIZ.
>>>>>
>>>>> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
>>>>> Centos 5
>>>>>
>>>>> When I go to do an ant run-install-seed I get:
>>>>>
>>>>> Error occurred during initialization of VM
>>>>> Could not reserve enough space for object heap
>>>>> Could not create the Java virtual machine.
>>>>>
>>>>> I've inserted an alias into my /etc/profile.d/java.sh (same as  
>>>>> bashrc
>>>>> but
>>>>> cleaner for CENT/RHEL products) so that I have:
>>>>> export JAVA_HOME=/opt/jdk1.6.0_13/jre
>>>>> PATH=$PATH:$JAVA_HOME/bin
>>>>> alias java='java -Xms2m -Xmx16m'
>>>>>
>>>>> I'm told the Xms and Xmx will help lower the memory hogging that  
>>>>> java
>>>>> wants
>>>>> to do, but I'm having little success.  I'm fine with java -version
>>>>> and javac
>>>>> -version.  So JVM itself is working, but I think it's trying to  
>>>>> grab too
>>>>> much memory that the virtual server core won't grant me at one  
>>>>> time.
>>>>>
>>>>> Has anyone worked this this type of thing?
>>>>>
>>>>> Thanks!!
>>>>>
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[BJ Freeman]

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And if you have sites frequently under heavy load then chances are a
shared server isn't a good idea anyway.

exactly.

David E Jones sent the following on 3/31/2009 3:16 PM:

>
> What does peak CPU have to do with it? All programs use significant CPU
> time every now and then... but usually not for long periods of time. App
> servers typically don't use much CPU time unless they are under heavy
> load... and if you have sites frequently under heavy load then chances
> are a shared server isn't a good idea anyway. So, what's the point?
>
> -David
>
>
> On Mar 31, 2009, at 4:13 PM, BJ Freeman wrote:
>
> sounds like you got it working on shared server, based on my experience
> when seems lot less than yours, I don't see how more than one instance
> can share when another instance is running 70-90% cpu, at peak times.
>
> I would guess it is like a bare-bones system with out many threads, or
> activity.
>
>
> David E Jones sent the following on 3/31/2009 1:34 PM:
>>>>
>>>> OFBiz will definitely work on a shared server, I've worked with dozens
>>>> of clients who have done that. It isn't too hard to fit half a dozen
>>>> instances on a single low-end (but modern) server, with databases for
>>>> each too. Of course, shared server approaches are as varied as holidays
>>>> around the world and there are many variations where OFBiz would not
>>>> run.
>>>>
>>>> Running in 256M would be pretty tight, even for a low-traffic site. Is
>>>> that the amount of memory available to the OS, or to the JVM? If it is
>>>> the memory available to the OS, and if there is no database also running
>>>> on the box (which would definitely make 256M too little), then the -Xmx
>>>> parameter should be about 2/3 of your memory (the 256M). If that is the
>>>> amount available to the JVM, then set -Xmx to 256M, and -Xms to the same
>>>> thing (on a dedicated server no use having Java play with expanding and
>>>> contracting the memory it uses).
>>>>
>>>> -David
>>>>
>>>>
>>>> On Mar 31, 2009, at 1:44 PM, BJ Freeman wrote:
>>>>
>>>> as the startofbiz.sh says. 128megs minimum.
>>>> Xms128M -Xmx512M
>>>> Ofbiz will not work on a shared server.
>>>> there are times it will use 70-90% of the CPU time.
>>>>
>>>> Branden Strickland sent the following on 3/31/2009 9:10 AM:
>>>>>>> All,
>>>>>>>
>>>>>>> It's been a while since I've worked with OFBIZ but the time has
>>>>>>> come to
>>>>>>> resume working with it.
>>>>>>>
>>>>>>> I know the answer to my question (sort of) but need some guidance
>>>>>>> from some
>>>>>>> good JAVA guys... (YOU!)
>>>>>>>
>>>>>>> Overview:
>>>>>>> Godaddy's virtual dedicated servers are setup with virtuoso, they
>>>>>>> alocate
>>>>>>> only the needed memory up to what you have for max (me = 256mb)  This
>>>>>>> should
>>>>>>> be fine as I've gotten a test box with that to run OFBIZ.
>>>>>>>
>>>>>>> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
>>>>>>> Centos 5
>>>>>>>
>>>>>>> When I go to do an ant run-install-seed I get:
>>>>>>>
>>>>>>> Error occurred during initialization of VM
>>>>>>> Could not reserve enough space for object heap
>>>>>>> Could not create the Java virtual machine.
>>>>>>>
>>>>>>> I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc
>>>>>>> but
>>>>>>> cleaner for CENT/RHEL products) so that I have:
>>>>>>> export JAVA_HOME=/opt/jdk1.6.0_13/jre
>>>>>>> PATH=$PATH:$JAVA_HOME/bin
>>>>>>> alias java='java -Xms2m -Xmx16m'
>>>>>>>
>>>>>>> I'm told the Xms and Xmx will help lower the memory hogging that java
>>>>>>> wants
>>>>>>> to do, but I'm having little success.  I'm fine with java -version
>>>>>>> and javac
>>>>>>> -version.  So JVM itself is working, but I think it's trying to
>>>>>>> grab too
>>>>>>> much memory that the virtual server core won't grant me at one time.
>>>>>>>
>>>>>>> Has anyone worked this this type of thing?
>>>>>>>
>>>>>>> Thanks!!
>>>>>>>

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[gnomie]

Hi Branden,

  VPS configurations often limit the amount of virtual memory that can be
allocated by processes (e.g. see privmpages in virtuozzo). The JVM is one of
those programs that really loves to allocate large chunks of virtual memory
for all kinds of memory areas it uses without necessarily ever using it.

  There is ways to mitigate this problem though. Apart from the Java heap
you should look into permspace and code cache sizing (speaking SUN JVM only
here). There is VM options to limit both (e.g. -XX:ReservedCodeCacheSize=32m
-XX:MaxPermSize=64m). Also see here in general
http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp.

  In order to find suitable numbers, run your application locally, connect
to it with jconsole (see
http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html), and
have a look at the memory mbeans. Make sure to run the app for a moment and
traverse most of its "parts" so that code gets loaded and JIT compiled. Add
a little (say %30) to the used permspace and code cache numbers.

  That worked for me (although not using OFBIZ).

  Good Luck!

hb

On Tue, Mar 31, 2009 at 6:10 PM, Branden Strickland <
[hidden email]> wrote:

> All,
>
> It's been a while since I've worked with OFBIZ but the time has come to
> resume working with it.
>
> I know the answer to my question (sort of) but need some guidance from some
> good JAVA guys... (YOU!)
>
> Overview:
> Godaddy's virtual dedicated servers are setup with virtuoso, they alocate
> only the needed memory up to what you have for max (me = 256mb)  This
> should
> be fine as I've gotten a test box with that to run OFBIZ.
>
> I have everything setup; Ant, JDK1.6,ofbiz svn exported.
> Centos 5
>
> When I go to do an ant run-install-seed I get:
>
> Error occurred during initialization of VM
> Could not reserve enough space for object heap
> Could not create the Java virtual machine.
>
> I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc but
> cleaner for CENT/RHEL products) so that I have:
> export JAVA_HOME=/opt/jdk1.6.0_13/jre
> PATH=$PATH:$JAVA_HOME/bin
> alias java='java -Xms2m -Xmx16m'
>
> I'm told the Xms and Xmx will help lower the memory hogging that java wants
> to do, but I'm having little success.  I'm fine with java -version and
> javac
> -version.  So JVM itself is working, but I think it's trying to grab too
> much memory that the virtual server core won't grant me at one time.
>
> Has anyone worked this this type of thing?
>
> Thanks!!
>

[Branden Strickland]

Thank you all!!!

I did get it working (although as specified performance isn't where it
should be.)  I had to modify the jvm params for ant, tomcat, and jvm itself
in a .sh script neatly placed in /etc/profile.d/

It's a virtual server on Godaddy and their technical turned into a sales
call.  They want me to upgrade to a full dedicated server... Which I'll do
once I have proof of concept.  I still need to work on getting httpd's
config correct with regards to reverse proxy so my "clients" can go to
order.domainname.com and get to the ecommerce front end.

I'm only going to be running the ecommerce side, with some access to the
backend to look at invoices.  This will be a small group (not just anyone
can go to the site and buy things (buying group)) So I'm hoping I can use
the shared server for a year and get things just how i want them and take
back up and migrate it to a full dedicated server.  Godaddy wasn't about to
modfy their virtuoso settings ither..... jerks!

Thanks for all the help!  I'm sure I'll be in touch about the proxy stuff in
a short time!!

Thanks again!

On Wed, Apr 1, 2009 at 4:54 AM, Henning Blohm <[hidden email]>wrote:

> Hi Branden,
>
>  VPS configurations often limit the amount of virtual memory that can be
> allocated by processes (e.g. see privmpages in virtuozzo). The JVM is one
> of
> those programs that really loves to allocate large chunks of virtual memory
> for all kinds of memory areas it uses without necessarily ever using it.
>
>  There is ways to mitigate this problem though. Apart from the Java heap
> you should look into permspace and code cache sizing (speaking SUN JVM only
> here). There is VM options to limit both (e.g.
> -XX:ReservedCodeCacheSize=32m
> -XX:MaxPermSize=64m). Also see here in general
> http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp.
>
>  In order to find suitable numbers, run your application locally, connect
> to it with jconsole (see
> http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html), and
> have a look at the memory mbeans. Make sure to run the app for a moment and
> traverse most of its "parts" so that code gets loaded and JIT compiled. Add
> a little (say %30) to the used permspace and code cache numbers.
>
>  That worked for me (although not using OFBIZ).
>
>  Good Luck!
>
> hb
>
> On Tue, Mar 31, 2009 at 6:10 PM, Branden Strickland <
> [hidden email]> wrote:
>
> > All,
> >
> > It's been a while since I've worked with OFBIZ but the time has come to
> > resume working with it.
> >
> > I know the answer to my question (sort of) but need some guidance from
> some
> > good JAVA guys... (YOU!)
> >
> > Overview:
> > Godaddy's virtual dedicated servers are setup with virtuoso, they alocate
> > only the needed memory up to what you have for max (me = 256mb)  This
> > should
> > be fine as I've gotten a test box with that to run OFBIZ.
> >
> > I have everything setup; Ant, JDK1.6,ofbiz svn exported.
> > Centos 5
> >
> > When I go to do an ant run-install-seed I get:
> >
> > Error occurred during initialization of VM
> > Could not reserve enough space for object heap
> > Could not create the Java virtual machine.
> >
> > I've inserted an alias into my /etc/profile.d/java.sh (same as bashrc but
> > cleaner for CENT/RHEL products) so that I have:
> > export JAVA_HOME=/opt/jdk1.6.0_13/jre
> > PATH=$PATH:$JAVA_HOME/bin
> > alias java='java -Xms2m -Xmx16m'
> >
> > I'm told the Xms and Xmx will help lower the memory hogging that java
> wants
> > to do, but I'm having little success.  I'm fine with java -version and
> > javac
> > -version.  So JVM itself is working, but I think it's trying to grab too
> > much memory that the virtual server core won't grant me at one time.
> >
> > Has anyone worked this this type of thing?
> >
> > Thanks!!
> >
>