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Too many session are creating in the server.

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skpradeepkumar

Too many session are creating in the server.

Hi All,

We have deployed the ofbiz with tomcat on VPS server.
It is creating too many dummy sessions and consuming loot of memory.
Could you please help in this.
What might be the reason?
How can we customize the application to reduce memory consumption?

--
With regards,
S K Pradeep kumar

Harmeet Bedi

Re: Too many session are creating in the server.

Are these http sessions or database connections ?
If former, you could try to set lower timeouts. Look at web.xml per component. see session-timeout. Logout i believe ends session so not sure why your session would increase under standard use. Is this in a load test environment ?
If latter, you could change entityengine.xml to configure database pool.

Harmeet

----- Original Message -----
From: "S K Pradeep Kumar" <[hidden email]>
To: [hidden email]
Sent: Saturday, July 25, 2009 5:21:49 AM GMT -05:00 US/Canada Eastern
Subject: Too many session are creating in the server.

Hi All,

We have deployed the ofbiz with tomcat on VPS server.
It is creating too many dummy sessions and consuming loot of memory.
Could you please help in this.
What might be the reason?
How can we customize the application to reduce memory consumption?

--
With regards,
S K Pradeep kumar

gnomie

Re: Too many session are creating in the server.

In reply to this post by skpradeepkumar

Operating a Java Server on a VPS requires some tweaking. First of all
you should check the current memory consumption in your scenario using,
for example, jconsole (which is part of the JDK since 1.5). In order to
connect to a running jconsole instance, you should some JMX system
properties, e.g.

-Dcom.sun.management.config.file=management.properties

and put a management.properties file in your ofbiz folder (next to
startofbiz.sh) that looks like this:

com.sun.management.jmxremote=true
com.sun.management.jmxremote.port=7777
com.sun.management.jmxremote.ssl=false
com.sun.management.jmxremote.authenticate=false

(assuming you are using the SUN JDKs).

Note: this should never be used in production as the JMX access is
completely unsecured this way!

With the config above, you can connect via

jconsole localhost:7777

Now run your load test or simulate your scenario and check the memory
data in jconsole. Trigger a few GC's.

Check the various memory regions by going to the "Memory" tab or
directly to MBeans --> java.lang --> MemoryPool.

In my experience in particular the CodeCache pool is very much oversized
and the SUN JVM allocates rather large chunks of memory here. Which is
normally not a problem, but VPS's tend to have very tight virtual memory
quotas (which seems really unnecessary).

Anyway, in order to redruce memory consumption, you should limit heap,
perm space, code cache, using the VM settings

-Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
-XX:MaxPermSize=<perm>m

where <heap>,<cc>,<perm> are placeholders for your settings.

While <perm> and <cc> should not change dramatically after your scenario
has run (so add a little on top of your measurements), the heap size
will also have
to reflect user session memory (so add some more. No idea how big a
session in ofbiz gets in the end).

Good luck,
Henning

Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:

> Hi All,
>
> We have deployed the ofbiz with tomcat on VPS server.
> It is creating too many dummy sessions and consuming loot of memory.
> Could you please help in this.
> What might be the reason?
> How can we customize the application to reduce memory consumption?
>

skpradeepkumar

Re: Too many session are creating in the server.

thanks <goog_1248689391523>Henning,

On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]> wrote:

> Operating a Java Server on a VPS requires some tweaking. First of all
> you should check the current memory consumption in your scenario using,
> for example, jconsole (which is part of the JDK since 1.5). In order to
> connect to a running jconsole instance, you should some JMX system
> properties, e.g.
>
> -Dcom.sun.management.config.file=management.properties
>
> and put a management.properties file in your ofbiz folder (next to
> startofbiz.sh) that looks like this:
>
> com.sun.management.jmxremote=true
> com.sun.management.jmxremote.port=7777
> com.sun.management.jmxremote.ssl=false
> com.sun.management.jmxremote.authenticate=false
>
> (assuming you are using the SUN JDKs).
>
> Note: this should never be used in production as the JMX access is
> completely unsecured this way!
>
> With the config above, you can connect via
>
> jconsole localhost:7777
>
> Now run your load test or simulate your scenario and check the memory
> data in jconsole. Trigger a few GC's.
>
> Check the various memory regions by going to the "Memory" tab or
> directly to MBeans --> java.lang --> MemoryPool.
>
> In my experience in particular the CodeCache pool is very much oversized
> and the SUN JVM allocates rather large chunks of memory here. Which is
> normally not a problem, but VPS's tend to have very tight virtual memory
> quotas (which seems really unnecessary).
>
> Anyway, in order to redruce memory consumption, you should limit heap,
> perm space, code cache, using the VM settings
>
> -Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
> -XX:MaxPermSize=<perm>m
>
> where <heap>,<cc>,<perm> are placeholders for your settings.
>
> While <perm> and <cc> should not change dramatically after your scenario
> has run (so add a little on top of your measurements), the heap size
> will also have
> to reflect user session memory (so add some more. No idea how big a
> session in ofbiz gets in the end).
>
> Good luck,
> Henning
>
>
>
> Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:
>
> > Hi All,
> >
> > We have deployed the ofbiz with tomcat on VPS server.
> > It is creating too many dummy sessions and consuming loot of memory.
> > Could you please help in this.
> > What might be the reason?
> > How can we customize the application to reduce memory consumption?
> >
>

--
With regards,
S K Pradeep kumar

skpradeepkumar

Re: Too many session are creating in the server.

In reply to this post by gnomie

Hi,

I have tested with the following instruction given by Henning, and
compered the results with ofbiz release 4.0 and it seems that my application
is working fine locally,

But my problem persists online and in my online application i am having.

Application is running on linux i836
With 2gb of ram
And
my java consumes 30 to 40 % of memory normally and mySQL consumes 7.9 % of
memory.
Some times the CPU usage goes upto 150 % and hangs up the server and java
consumes more than 60% memory.

Can anybody tell me what might be the reason.?

i have compared with the same such kind of apps deployed on vps they
consumes 2 to 4 % of memory for MySQL but this apps consumes 7.9% of memory.
Might be it is the problem
If yes please, guide so that i can work on this.
Please...

With regards,
S K Pradeep kumar

On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]> wrote:

--
With regards,
S K Pradeep kumar

David E. Jones-2

Re: Too many session are creating in the server.

The release4.0 branch has issues that have never been resolved. Please
understand that each release branch represents a sub-community of the
overall OFBiz community, or in other words there are more people
involved with OFBiz in general than there are with a particular
release branch. A lot of things, including low-level things, were
improved in the two years between the release4.0 branch and the
release09.04 branch.

It's hard to say exactly what issue you are running into that at this
point I don't think anyone involved with the development and
maintenance of OFBiz would recommend using the release4.0 branch
because of the issues it has (including significant connection pool
problems with the old Minerva connection pool) and also because of the
significant new features and better ways of doing things and more
complete functionality in the release09.04 branch.

-David

On Jul 27, 2009, at 2:10 PM, S K Pradeep Kumar wrote:

> Hi,
>
> I have tested with the following instruction given by Henning, and
> compered the results with ofbiz release 4.0 and it seems that my
> application
> is working fine locally,
>
> But my problem persists online and in my online application i am
> having.
>
> Application is running on linux i836
> With 2gb of ram
> And
> my java consumes 30 to 40 % of memory normally and mySQL consumes
> 7.9 % of
> memory.
> Some times the CPU usage goes upto 150 % and hangs up the server and
> java
> consumes more than 60% memory.
>
> Can anybody tell me what might be the reason.?
>
> i have compared with the same such kind of apps deployed on vps they
> consumes 2 to 4 % of memory for MySQL but this apps consumes 7.9% of
> memory.
> Might be it is the problem
> If yes please, guide so that i can work on this.
> Please...
>
> With regards,
> S K Pradeep kumar
>
>
> On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]>
> wrote:
>
>> Operating a Java Server on a VPS requires some tweaking. First of
>> all
>> you should check the current memory consumption in your scenario
>> using,
>> for example, jconsole (which is part of the JDK since 1.5). In
>> order to
>> connect to a running jconsole instance, you should some JMX system
>> properties, e.g.
>>
>> -Dcom.sun.management.config.file=management.properties
>>
>> and put a management.properties file in your ofbiz folder (next to
>> startofbiz.sh) that looks like this:
>>
>> com.sun.management.jmxremote=true
>> com.sun.management.jmxremote.port=7777
>> com.sun.management.jmxremote.ssl=false
>> com.sun.management.jmxremote.authenticate=false
>>
>> (assuming you are using the SUN JDKs).
>>
>> Note: this should never be used in production as the JMX access is
>> completely unsecured this way!
>>
>> With the config above, you can connect via
>>
>> jconsole localhost:7777
>>
>> Now run your load test or simulate your scenario and check the memory
>> data in jconsole. Trigger a few GC's.
>>
>> Check the various memory regions by going to the "Memory" tab or
>> directly to MBeans --> java.lang --> MemoryPool.
>>
>> In my experience in particular the CodeCache pool is very much
>> oversized
>> and the SUN JVM allocates rather large chunks of memory here. Which
>> is
>> normally not a problem, but VPS's tend to have very tight virtual
>> memory
>> quotas (which seems really unnecessary).
>>
>> Anyway, in order to redruce memory consumption, you should limit
>> heap,
>> perm space, code cache, using the VM settings
>>
>> -Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
>> -XX:MaxPermSize=<perm>m
>>
>> where <heap>,<cc>,<perm> are placeholders for your settings.
>>
>> While <perm> and <cc> should not change dramatically after your
>> scenario
>> has run (so add a little on top of your measurements), the heap size
>> will also have
>> to reflect user session memory (so add some more. No idea how big a
>> session in ofbiz gets in the end).
>>
>> Good luck,
>> Henning
>>
>>
>>
>> Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:
>>
>>> Hi All,
>>>
>>> We have deployed the ofbiz with tomcat on VPS server.
>>> It is creating too many dummy sessions and consuming loot of
>>> memory.
>>> Could you please help in this.
>>> What might be the reason?
>>> How can we customize the application to reduce memory consumption?
>>>
>>
>
>
>
> --
> With regards,
> S K Pradeep kumar

skpradeepkumar

Re: Too many session are creating in the server.

Hi,

But i have compered my application with the other similar applications
runinng on the server having similar configuration but those apps are
running fine the issue is only with this apps. i.e. www.tribu.co.uk

With regards,
S K Pradeep kumar

On Tue, Jul 28, 2009 at 1:59 AM, David E Jones <[hidden email]> wrote:

>
> The release4.0 branch has issues that have never been resolved. Please
> understand that each release branch represents a sub-community of the
> overall OFBiz community, or in other words there are more people involved
> with OFBiz in general than there are with a particular release branch. A lot
> of things, including low-level things, were improved in the two years
> between the release4.0 branch and the release09.04 branch.
>
> It's hard to say exactly what issue you are running into that at this point
> I don't think anyone involved with the development and maintenance of OFBiz
> would recommend using the release4.0 branch because of the issues it has
> (including significant connection pool problems with the old Minerva
> connection pool) and also because of the significant new features and better
> ways of doing things and more complete functionality in the release09.04
> branch.
>
> -David
>
>
>
> On Jul 27, 2009, at 2:10 PM, S K Pradeep Kumar wrote:
>
> Hi,
>>
>> I have tested with the following instruction given by Henning, and
>> compered the results with ofbiz release 4.0 and it seems that my
>> application
>> is working fine locally,
>>
>> But my problem persists online and in my online application i am having.
>>
>> Application is running on linux i836
>> With 2gb of ram
>> And
>> my java consumes 30 to 40 % of memory normally and mySQL consumes 7.9 % of
>> memory.
>> Some times the CPU usage goes upto 150 % and hangs up the server and java
>> consumes more than 60% memory.
>>
>> Can anybody tell me what might be the reason.?
>>
>> i have compared with the same such kind of apps deployed on vps they
>> consumes 2 to 4 % of memory for MySQL but this apps consumes 7.9% of
>> memory.
>> Might be it is the problem
>> If yes please, guide so that i can work on this.
>> Please...
>>
>> With regards,
>> S K Pradeep kumar
>>
>>
>> On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]> wrote:
>>
>> Operating a Java Server on a VPS requires some tweaking. First of all
>>> you should check the current memory consumption in your scenario using,
>>> for example, jconsole (which is part of the JDK since 1.5). In order to
>>> connect to a running jconsole instance, you should some JMX system
>>> properties, e.g.
>>>
>>> -Dcom.sun.management.config.file=management.properties
>>>
>>> and put a management.properties file in your ofbiz folder (next to
>>> startofbiz.sh) that looks like this:
>>>
>>> com.sun.management.jmxremote=true
>>> com.sun.management.jmxremote.port=7777
>>> com.sun.management.jmxremote.ssl=false
>>> com.sun.management.jmxremote.authenticate=false
>>>
>>> (assuming you are using the SUN JDKs).
>>>
>>> Note: this should never be used in production as the JMX access is
>>> completely unsecured this way!
>>>
>>> With the config above, you can connect via
>>>
>>> jconsole localhost:7777
>>>
>>> Now run your load test or simulate your scenario and check the memory
>>> data in jconsole. Trigger a few GC's.
>>>
>>> Check the various memory regions by going to the "Memory" tab or
>>> directly to MBeans --> java.lang --> MemoryPool.
>>>
>>> In my experience in particular the CodeCache pool is very much oversized
>>> and the SUN JVM allocates rather large chunks of memory here. Which is
>>> normally not a problem, but VPS's tend to have very tight virtual memory
>>> quotas (which seems really unnecessary).
>>>
>>> Anyway, in order to redruce memory consumption, you should limit heap,
>>> perm space, code cache, using the VM settings
>>>
>>> -Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
>>> -XX:MaxPermSize=<perm>m
>>>
>>> where <heap>,<cc>,<perm> are placeholders for your settings.
>>>
>>> While <perm> and <cc> should not change dramatically after your scenario
>>> has run (so add a little on top of your measurements), the heap size
>>> will also have
>>> to reflect user session memory (so add some more. No idea how big a
>>> session in ofbiz gets in the end).
>>>
>>> Good luck,
>>> Henning
>>>
>>>
>>>
>>> Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:
>>>
>>> Hi All,
>>>>
>>>> We have deployed the ofbiz with tomcat on VPS server.
>>>> It is creating too many dummy sessions and consuming loot of memory.
>>>> Could you please help in this.
>>>> What might be the reason?
>>>> How can we customize the application to reduce memory consumption?
>>>>
>>>>
>>>
>>
>>
>> --
>> With regards,
>> S K Pradeep kumar
>>
>
>

--
With regards,
S K Pradeep kumar

David E. Jones-2

Re: Too many session are creating in the server.

Like I said in my other message, a lot more information would be
necessary to find out exactly what is causing the problem that you
mention.

If it is related to the database connection pool one instance can vary
a lot from another if they are running different code. You may have
some custom code that does not handle transactions properly. With a
more recent version of OFBiz the connection pool will recover bad
connections pretty well, but the old one did not. What that means is
that when the bad code runs it may put a connection in a bad state and
the connection pool will never recover that connection, and eventually
the connection pool will be full of bad connections, and that will
bring down your server. Sometimes those bad connections, or the code
related to them, are related to bad threads that consume a lot of
processor time.

Still, that is just a guess...

-David

On Jul 27, 2009, at 2:44 PM, S K Pradeep Kumar wrote:

> Hi,
>
> But i have compered my application with the other similar
> applications
> runinng on the server having similar configuration but those apps are
> running fine the issue is only with this apps. i.e. www.tribu.co.uk
>
> With regards,
> S K Pradeep kumar
>
> On Tue, Jul 28, 2009 at 1:59 AM, David E Jones <[hidden email]> wrote:
>
>>
>> The release4.0 branch has issues that have never been resolved.
>> Please
>> understand that each release branch represents a sub-community of the
>> overall OFBiz community, or in other words there are more people
>> involved
>> with OFBiz in general than there are with a particular release
>> branch. A lot
>> of things, including low-level things, were improved in the two years
>> between the release4.0 branch and the release09.04 branch.
>>
>> It's hard to say exactly what issue you are running into that at
>> this point
>> I don't think anyone involved with the development and maintenance
>> of OFBiz
>> would recommend using the release4.0 branch because of the issues
>> it has
>> (including significant connection pool problems with the old Minerva
>> connection pool) and also because of the significant new features
>> and better
>> ways of doing things and more complete functionality in the
>> release09.04
>> branch.
>>
>> -David
>>
>>
>>
>> On Jul 27, 2009, at 2:10 PM, S K Pradeep Kumar wrote:
>>
>> Hi,
>>>
>>> I have tested with the following instruction given by Henning, and
>>> compered the results with ofbiz release 4.0 and it seems that my
>>> application
>>> is working fine locally,
>>>
>>> But my problem persists online and in my online application i am
>>> having.
>>>
>>> Application is running on linux i836
>>> With 2gb of ram
>>> And
>>> my java consumes 30 to 40 % of memory normally and mySQL consumes
>>> 7.9 % of
>>> memory.
>>> Some times the CPU usage goes upto 150 % and hangs up the server
>>> and java
>>> consumes more than 60% memory.
>>>
>>> Can anybody tell me what might be the reason.?
>>>
>>> i have compared with the same such kind of apps deployed on vps they
>>> consumes 2 to 4 % of memory for MySQL but this apps consumes 7.9% of
>>> memory.
>>> Might be it is the problem
>>> If yes please, guide so that i can work on this.
>>> Please...
>>>
>>> With regards,
>>> S K Pradeep kumar
>>>
>>>
>>> On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]>
>>> wrote:
>>>
>>> Operating a Java Server on a VPS requires some tweaking. First of
>>> all
>>>> you should check the current memory consumption in your scenario
>>>> using,
>>>> for example, jconsole (which is part of the JDK since 1.5). In
>>>> order to
>>>> connect to a running jconsole instance, you should some JMX system
>>>> properties, e.g.
>>>>
>>>> -Dcom.sun.management.config.file=management.properties
>>>>
>>>> and put a management.properties file in your ofbiz folder (next to
>>>> startofbiz.sh) that looks like this:
>>>>
>>>> com.sun.management.jmxremote=true
>>>> com.sun.management.jmxremote.port=7777
>>>> com.sun.management.jmxremote.ssl=false
>>>> com.sun.management.jmxremote.authenticate=false
>>>>
>>>> (assuming you are using the SUN JDKs).
>>>>
>>>> Note: this should never be used in production as the JMX access is
>>>> completely unsecured this way!
>>>>
>>>> With the config above, you can connect via
>>>>
>>>> jconsole localhost:7777
>>>>
>>>> Now run your load test or simulate your scenario and check the
>>>> memory
>>>> data in jconsole. Trigger a few GC's.
>>>>
>>>> Check the various memory regions by going to the "Memory" tab or
>>>> directly to MBeans --> java.lang --> MemoryPool.
>>>>
>>>> In my experience in particular the CodeCache pool is very much
>>>> oversized
>>>> and the SUN JVM allocates rather large chunks of memory here.
>>>> Which is
>>>> normally not a problem, but VPS's tend to have very tight virtual
>>>> memory
>>>> quotas (which seems really unnecessary).
>>>>
>>>> Anyway, in order to redruce memory consumption, you should limit
>>>> heap,
>>>> perm space, code cache, using the VM settings
>>>>
>>>> -Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
>>>> -XX:MaxPermSize=<perm>m
>>>>
>>>> where <heap>,<cc>,<perm> are placeholders for your settings.
>>>>
>>>> While <perm> and <cc> should not change dramatically after your
>>>> scenario
>>>> has run (so add a little on top of your measurements), the heap
>>>> size
>>>> will also have
>>>> to reflect user session memory (so add some more. No idea how big a
>>>> session in ofbiz gets in the end).
>>>>
>>>> Good luck,
>>>> Henning
>>>>
>>>>
>>>>
>>>> Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:
>>>>
>>>> Hi All,
>>>>>
>>>>> We have deployed the ofbiz with tomcat on VPS server.
>>>>> It is creating too many dummy sessions and consuming loot of
>>>>> memory.
>>>>> Could you please help in this.
>>>>> What might be the reason?
>>>>> How can we customize the application to reduce memory consumption?
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> With regards,
>>> S K Pradeep kumar
>>>
>>
>>
>
>
> --
> With regards,
> S K Pradeep kumar

skpradeepkumar

Re: Too many session are creating in the server.

Hi David,

Thanks, Can you please tell me some better ways, how can i collect the
information because i am working first time on the server issue. Here i am
testing the apps on server by just killing and restarting and comparing with
similar apps and using the stress tools to find memory consumption and the
stress tools doesn't able to give upto 150% cpu usage...

With regards,
S K Pradeep kumar

On Tue, Jul 28, 2009 at 2:19 AM, David E Jones <[hidden email]> wrote:

>
> Like I said in my other message, a lot more information would be necessary
> to find out exactly what is causing the problem that you mention.
>
> If it is related to the database connection pool one instance can vary a
> lot from another if they are running different code. You may have some
> custom code that does not handle transactions properly. With a more recent
> version of OFBiz the connection pool will recover bad connections pretty
> well, but the old one did not. What that means is that when the bad code
> runs it may put a connection in a bad state and the connection pool will
> never recover that connection, and eventually the connection pool will be
> full of bad connections, and that will bring down your server. Sometimes
> those bad connections, or the code related to them, are related to bad
> threads that consume a lot of processor time.
>
> Still, that is just a guess...
>
> -David
>
>
>
> On Jul 27, 2009, at 2:44 PM, S K Pradeep Kumar wrote:
>
> Hi,
>>
>> But i have compered my application with the other similar applications
>> runinng on the server having similar configuration but those apps are
>> running fine the issue is only with this apps. i.e. www.tribu.co.uk
>>
>> With regards,
>> S K Pradeep kumar
>>
>> On Tue, Jul 28, 2009 at 1:59 AM, David E Jones <[hidden email]> wrote:
>>
>>
>>> The release4.0 branch has issues that have never been resolved. Please
>>> understand that each release branch represents a sub-community of the
>>> overall OFBiz community, or in other words there are more people involved
>>> with OFBiz in general than there are with a particular release branch. A
>>> lot
>>> of things, including low-level things, were improved in the two years
>>> between the release4.0 branch and the release09.04 branch.
>>>
>>> It's hard to say exactly what issue you are running into that at this
>>> point
>>> I don't think anyone involved with the development and maintenance of
>>> OFBiz
>>> would recommend using the release4.0 branch because of the issues it has
>>> (including significant connection pool problems with the old Minerva
>>> connection pool) and also because of the significant new features and
>>> better
>>> ways of doing things and more complete functionality in the release09.04
>>> branch.
>>>
>>> -David
>>>
>>>
>>>
>>> On Jul 27, 2009, at 2:10 PM, S K Pradeep Kumar wrote:
>>>
>>> Hi,
>>>
>>>>
>>>> I have tested with the following instruction given by Henning, and
>>>> compered the results with ofbiz release 4.0 and it seems that my
>>>> application
>>>> is working fine locally,
>>>>
>>>> But my problem persists online and in my online application i am having.
>>>>
>>>> Application is running on linux i836
>>>> With 2gb of ram
>>>> And
>>>> my java consumes 30 to 40 % of memory normally and mySQL consumes 7.9 %
>>>> of
>>>> memory.
>>>> Some times the CPU usage goes upto 150 % and hangs up the server and
>>>> java
>>>> consumes more than 60% memory.
>>>>
>>>> Can anybody tell me what might be the reason.?
>>>>
>>>> i have compared with the same such kind of apps deployed on vps they
>>>> consumes 2 to 4 % of memory for MySQL but this apps consumes 7.9% of
>>>> memory.
>>>> Might be it is the problem
>>>> If yes please, guide so that i can work on this.
>>>> Please...
>>>>
>>>> With regards,
>>>> S K Pradeep kumar
>>>>
>>>>
>>>> On Sun, Jul 26, 2009 at 9:15 PM, Henning <[hidden email]>
>>>> wrote:
>>>>
>>>> Operating a Java Server on a VPS requires some tweaking. First of all
>>>>
>>>>> you should check the current memory consumption in your scenario using,
>>>>> for example, jconsole (which is part of the JDK since 1.5). In order to
>>>>> connect to a running jconsole instance, you should some JMX system
>>>>> properties, e.g.
>>>>>
>>>>> -Dcom.sun.management.config.file=management.properties
>>>>>
>>>>> and put a management.properties file in your ofbiz folder (next to
>>>>> startofbiz.sh) that looks like this:
>>>>>
>>>>> com.sun.management.jmxremote=true
>>>>> com.sun.management.jmxremote.port=7777
>>>>> com.sun.management.jmxremote.ssl=false
>>>>> com.sun.management.jmxremote.authenticate=false
>>>>>
>>>>> (assuming you are using the SUN JDKs).
>>>>>
>>>>> Note: this should never be used in production as the JMX access is
>>>>> completely unsecured this way!
>>>>>
>>>>> With the config above, you can connect via
>>>>>
>>>>> jconsole localhost:7777
>>>>>
>>>>> Now run your load test or simulate your scenario and check the memory
>>>>> data in jconsole. Trigger a few GC's.
>>>>>
>>>>> Check the various memory regions by going to the "Memory" tab or
>>>>> directly to MBeans --> java.lang --> MemoryPool.
>>>>>
>>>>> In my experience in particular the CodeCache pool is very much
>>>>> oversized
>>>>> and the SUN JVM allocates rather large chunks of memory here. Which is
>>>>> normally not a problem, but VPS's tend to have very tight virtual
>>>>> memory
>>>>> quotas (which seems really unnecessary).
>>>>>
>>>>> Anyway, in order to redruce memory consumption, you should limit heap,
>>>>> perm space, code cache, using the VM settings
>>>>>
>>>>> -Xms<heap>M -Xmx<heap>M -XX:ReservedCodeCacheSize=<cc>m
>>>>> -XX:MaxPermSize=<perm>m
>>>>>
>>>>> where <heap>,<cc>,<perm> are placeholders for your settings.
>>>>>
>>>>> While <perm> and <cc> should not change dramatically after your
>>>>> scenario
>>>>> has run (so add a little on top of your measurements), the heap size
>>>>> will also have
>>>>> to reflect user session memory (so add some more. No idea how big a
>>>>> session in ofbiz gets in the end).
>>>>>
>>>>> Good luck,
>>>>> Henning
>>>>>
>>>>>
>>>>>
>>>>> Am Samstag, den 25.07.2009, 14:51 +0530 schrieb S K Pradeep Kumar:
>>>>>
>>>>> Hi All,
>>>>>
>>>>>>
>>>>>> We have deployed the ofbiz with tomcat on VPS server.
>>>>>> It is creating too many dummy sessions and consuming loot of memory.
>>>>>> Could you please help in this.
>>>>>> What might be the reason?
>>>>>> How can we customize the application to reduce memory consumption?
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>> --
>>>> With regards,
>>>> S K Pradeep kumar
>>>>
>>>>
>>>
>>>
>>
>> --
>> With regards,
>> S K Pradeep kumar
>>
>
>

--
With regards,
S K Pradeep kumar