You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@karaf.apache.org by Srikanth Hugar <sr...@gmail.com> on 2015/07/17 10:46:24 UTC
apache karaf 3.0.0 ( with jetty container ) GC pauses...
Hello,
I have a application running with *apache karaf 3.0.0* (with *jetty *
container).
I wanted to run the some performance tests. So started to check the *memory
*and *CPU without *running any tests.
While profiling noticed that, memory usage goes up and comes down every
hour.
Basically *GC pauses* happening every *hour*.
Is it a default behavior? Can we change? If yes, please let me know how to
change.
*Please find the attached image for your reference.*
Thank you.
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Dmitry Konstantinov <ne...@gmail.com>.
Hi,
The additional reason why you can see periodic (hourly) full GCs is RMI
distributed GC mechanism. Please take a look at
*sun.rmi.dgc.client.gcInterval, **sun.rmi.dgc.server.gcInterval* parameters
in
https://docs.oracle.com/javase/8/docs/technotes/guides/rmi/sunrmiproperties.html
If you are worrying about memory allocations itself, not about the periodic
GCs - there are some background activities in Karaf, like File Admin
directory watcher, which allocate small amount of memory continuously and
it is normal behavior.
Regards
Dmitry Konstantinov
2015-07-17 12:38 GMT+03:00 Jean-Baptiste Onofré <jb...@nanthrax.net>:
> The default are in bin/karaf, and you can override bin/setenv.
>
> Regards
> JB
>
> On 07/17/2015 11:28 AM, Srikanth Hugar wrote:
>
>> But i could not find any GC argument in karaf scripts.
>> I was expecting /*XX:+USeParNewGC* argument for JVM. Please correct me
>> if i am wrong./
>>
>> Srikanth Hugar
>> www.gharki.com <http://www.gharki.com>
>>
>>
>>
>> On Fri, Jul 17, 2015 at 2:40 PM, Jean-Baptiste Onofré <jb@nanthrax.net
>> <ma...@nanthrax.net>> wrote:
>>
>> No, CMS is the default.
>>
>> On 07/17/2015 10:59 AM, Srikanth Hugar wrote:
>>
>> ok. apache karaf 3.0.0 does not use G1 by default?
>>
>> Srikanth Hugar
>> www.gharki.com <http://www.gharki.com> <http://www.gharki.com>
>>
>>
>>
>> On Fri, Jul 17, 2015 at 2:24 PM, Jean-Baptiste Onofré
>> <jb@nanthrax.net <ma...@nanthrax.net>
>> <mailto:jb@nanthrax.net <ma...@nanthrax.net>>> wrote:
>>
>> Hi,
>>
>> you can change your JVM settings to change the GC behavior
>> (you can
>> use the G1 or, if you want to still use the CMS, you can
>> tune the
>> NewRatio, etc).
>>
>> Regards
>> JB
>>
>> On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
>>
>> Hello,
>>
>> I have a application running with *apache karaf
>> 3.0.0* (with
>> *jetty
>> *container).
>> I wanted to run the some performance tests. So started
>> to check the
>> *memory *and *CPU without *running any tests.
>>
>> While profiling noticed that, memory usage goes up and
>> comes
>> down every
>> hour.
>>
>> Basically *GC pauses* happening every *hour*.
>>
>> Is it a default behavior? Can we change? If yes, please
>> let me
>> know how
>> to change.
>>
>> *Please find the attached image for your reference.*
>>
>> Thank you.
>>
>>
>> --
>> Jean-Baptiste Onofré
>> jbonofre@apache.org <ma...@apache.org>
>> <mailto:jbonofre@apache.org <ma...@apache.org>>
>> http://blog.nanthrax.net
>> Talend - http://www.talend.com
>>
>>
>>
>> --
>> Jean-Baptiste Onofré
>> jbonofre@apache.org <ma...@apache.org>
>> http://blog.nanthrax.net
>> Talend - http://www.talend.com
>>
>>
>>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
--
Dmitry Konstantinov
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Jean-Baptiste Onofré <jb...@nanthrax.net>.
The default are in bin/karaf, and you can override bin/setenv.
Regards
JB
On 07/17/2015 11:28 AM, Srikanth Hugar wrote:
> But i could not find any GC argument in karaf scripts.
> I was expecting /*XX:+USeParNewGC* argument for JVM. Please correct me
> if i am wrong./
>
> Srikanth Hugar
> www.gharki.com <http://www.gharki.com>
>
>
>
> On Fri, Jul 17, 2015 at 2:40 PM, Jean-Baptiste Onofré <jb@nanthrax.net
> <ma...@nanthrax.net>> wrote:
>
> No, CMS is the default.
>
> On 07/17/2015 10:59 AM, Srikanth Hugar wrote:
>
> ok. apache karaf 3.0.0 does not use G1 by default?
>
> Srikanth Hugar
> www.gharki.com <http://www.gharki.com> <http://www.gharki.com>
>
>
>
> On Fri, Jul 17, 2015 at 2:24 PM, Jean-Baptiste Onofré
> <jb@nanthrax.net <ma...@nanthrax.net>
> <mailto:jb@nanthrax.net <ma...@nanthrax.net>>> wrote:
>
> Hi,
>
> you can change your JVM settings to change the GC behavior
> (you can
> use the G1 or, if you want to still use the CMS, you can
> tune the
> NewRatio, etc).
>
> Regards
> JB
>
> On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
>
> Hello,
>
> I have a application running with *apache karaf
> 3.0.0* (with
> *jetty
> *container).
> I wanted to run the some performance tests. So started
> to check the
> *memory *and *CPU without *running any tests.
>
> While profiling noticed that, memory usage goes up and
> comes
> down every
> hour.
>
> Basically *GC pauses* happening every *hour*.
>
> Is it a default behavior? Can we change? If yes, please
> let me
> know how
> to change.
>
> *Please find the attached image for your reference.*
>
> Thank you.
>
>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org <ma...@apache.org>
> <mailto:jbonofre@apache.org <ma...@apache.org>>
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
>
>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org <ma...@apache.org>
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
>
--
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Srikanth Hugar <sr...@gmail.com>.
But i could not find any GC argument in karaf scripts.
I was expecting *XX:+USeParNewGC argument for JVM. Please correct me if i
am wrong.*
Srikanth Hugar
www.gharki.com
On Fri, Jul 17, 2015 at 2:40 PM, Jean-Baptiste Onofré <jb...@nanthrax.net>
wrote:
> No, CMS is the default.
>
> On 07/17/2015 10:59 AM, Srikanth Hugar wrote:
>
>> ok. apache karaf 3.0.0 does not use G1 by default?
>>
>> Srikanth Hugar
>> www.gharki.com <http://www.gharki.com>
>>
>>
>>
>> On Fri, Jul 17, 2015 at 2:24 PM, Jean-Baptiste Onofré <jb@nanthrax.net
>> <ma...@nanthrax.net>> wrote:
>>
>> Hi,
>>
>> you can change your JVM settings to change the GC behavior (you can
>> use the G1 or, if you want to still use the CMS, you can tune the
>> NewRatio, etc).
>>
>> Regards
>> JB
>>
>> On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
>>
>> Hello,
>>
>> I have a application running with *apache karaf 3.0.0* (with
>> *jetty
>> *container).
>> I wanted to run the some performance tests. So started to check
>> the
>> *memory *and *CPU without *running any tests.
>>
>> While profiling noticed that, memory usage goes up and comes
>> down every
>> hour.
>>
>> Basically *GC pauses* happening every *hour*.
>>
>> Is it a default behavior? Can we change? If yes, please let me
>> know how
>> to change.
>>
>> *Please find the attached image for your reference.*
>>
>> Thank you.
>>
>>
>> --
>> Jean-Baptiste Onofré
>> jbonofre@apache.org <ma...@apache.org>
>> http://blog.nanthrax.net
>> Talend - http://www.talend.com
>>
>>
>>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Jean-Baptiste Onofré <jb...@nanthrax.net>.
No, CMS is the default.
On 07/17/2015 10:59 AM, Srikanth Hugar wrote:
> ok. apache karaf 3.0.0 does not use G1 by default?
>
> Srikanth Hugar
> www.gharki.com <http://www.gharki.com>
>
>
>
> On Fri, Jul 17, 2015 at 2:24 PM, Jean-Baptiste Onofré <jb@nanthrax.net
> <ma...@nanthrax.net>> wrote:
>
> Hi,
>
> you can change your JVM settings to change the GC behavior (you can
> use the G1 or, if you want to still use the CMS, you can tune the
> NewRatio, etc).
>
> Regards
> JB
>
> On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
>
> Hello,
>
> I have a application running with *apache karaf 3.0.0* (with
> *jetty
> *container).
> I wanted to run the some performance tests. So started to check the
> *memory *and *CPU without *running any tests.
>
> While profiling noticed that, memory usage goes up and comes
> down every
> hour.
>
> Basically *GC pauses* happening every *hour*.
>
> Is it a default behavior? Can we change? If yes, please let me
> know how
> to change.
>
> *Please find the attached image for your reference.*
>
> Thank you.
>
>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org <ma...@apache.org>
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
>
--
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Srikanth Hugar <sr...@gmail.com>.
ok. apache karaf 3.0.0 does not use G1 by default?
Srikanth Hugar
www.gharki.com
On Fri, Jul 17, 2015 at 2:24 PM, Jean-Baptiste Onofré <jb...@nanthrax.net>
wrote:
> Hi,
>
> you can change your JVM settings to change the GC behavior (you can use
> the G1 or, if you want to still use the CMS, you can tune the NewRatio,
> etc).
>
> Regards
> JB
>
> On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
>
>> Hello,
>>
>> I have a application running with *apache karaf 3.0.0* (with *jetty
>> *container).
>> I wanted to run the some performance tests. So started to check the
>> *memory *and *CPU without *running any tests.
>>
>> While profiling noticed that, memory usage goes up and comes down every
>> hour.
>>
>> Basically *GC pauses* happening every *hour*.
>>
>> Is it a default behavior? Can we change? If yes, please let me know how
>> to change.
>>
>> *Please find the attached image for your reference.*
>>
>> Thank you.
>>
>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>
Re: apache karaf 3.0.0 ( with jetty container ) GC pauses...
Posted by Jean-Baptiste Onofré <jb...@nanthrax.net>.
Hi,
you can change your JVM settings to change the GC behavior (you can use
the G1 or, if you want to still use the CMS, you can tune the NewRatio,
etc).
Regards
JB
On 07/17/2015 10:46 AM, Srikanth Hugar wrote:
> Hello,
>
> I have a application running with *apache karaf 3.0.0* (with *jetty
> *container).
> I wanted to run the some performance tests. So started to check the
> *memory *and *CPU without *running any tests.
>
> While profiling noticed that, memory usage goes up and comes down every
> hour.
>
> Basically *GC pauses* happening every *hour*.
>
> Is it a default behavior? Can we change? If yes, please let me know how
> to change.
>
> *Please find the attached image for your reference.*
>
> Thank you.
--
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com