Re: [Wrapper-user] Jar works with console, throws exceptions when launched via start?

[Leif M. <le...@ta...>]

Stas,
I was able to to check the default priorities using the following command:
ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm

On Ubuntu, the Wrapper is defaulting to a nice level of 0 and a
real-time priority of 24, but the JVM is set to a nice level of 0 and
a real-time priority of 19.
According to the nice manual however, the range of possible values is
-20 (most favorable) to 19 (least favorable)

If I set the PRIORITY in the script to 5 then the nice levels both get
set to 5, but the real-time priorities are 19 and 15 respectively.
This is actually lower priority.
Setting priorities to a value higher than 0 requires root privilege.

If do so and set it to -5, then the nice levels are both -5, and the
real-time priorities are 29 and 26 respectively.

So quick answer, the default is 0.   I need to look into the real-time
priority more on my end.   you are probable seeing the lower priority
do to this difference in real-time priorities between the top level
wrapper process and its child java process.  I had not noticed this
before.

Cheers,
Leif

On Wed, Oct 1, 2008 at 11:30 PM, Stas Oskin <sta...@gm...> wrote:
> Hi Leif.
>
> Thanks, I see.
>
> Do you have any idea how to find current priority level (so I could increase
> 1 by 1).
>
> Regards.
>
> 2008/10/1 Leif Mortenson <le...@ta...>
>>
>> Stas,
>> On linux, open your wrapper shell script in an editor and modify the
>> PRIORITY value found in the settings section towards the top.  These
>> are standard nice levels, so look at "man nice" for details.
>>
>> Cheers,
>> Leif
>>
>> On Wed, Oct 1, 2008 at 9:44 PM, Stas Oskin <sta...@gm...> wrote:
>> > Hi Leif.
>> >
>> > 2008/10/1 Leif Mortenson <le...@ta...>
>> >>
>> >> Stas,
>> >> That's great news.   The memory leaks were in the Java code?  What are
>> >> you maximum memory settings set to?  Are they low enough that the
>> >> entire JVM will fit in memory without any swapping along side the OS
>> >> and other apps being used?  Java performs very poorly when its memory
>> >> is being swapped out. (Not a Wrapper issue)
>> >
>> > The leaks were in JNI code and quickly took the whole memory. This
>> > caused
>> > Java to swap.
>> >
>> >>
>> >> About the CPU, I reread this thread but I don't think you ever told me
>> >> what platform you are running on.  That will make a big difference.
>> >> Under UNIX, there is a setting in the shell script which allows you to
>> >> specify a "nice" level to control the priority.
>> >
>> > We use Linux - CentOS distro. What setting we should look to?
>> >
>> >>
>> >> On Windows, it is done using the
>> >> wrapper.ntservice.process_priority=NORMAL property.  Please be sure to
>> >> read the warnings in the documentation.
>> >>
>> >>
>> >> http://wrapper.tanukisoftware.org/doc/english/prop-ntservice-process-priority.html
>> >>
>> >> Normally on most platforms, the OS gives priority to the Windowing
>> >> system and those processes to make them more responsive.  That is why
>> >> on UNIX, it is good to run servers in a headless environment.
>> >
>> > Hmm, we running the server without any X installed, strictly via console
>> > -
>> > is this what you call headless?
>> >
>> > Actually, this is the main app the server was targeted to, so we indeed
>> > prefer to give it all the priority we can (without hanging the OS of
>> > course).
>> >
>> > Regards.
>> >
>> >
>> > -------------------------------------------------------------------------
>> > This SF.Net email is sponsored by the Moblin Your Move Developer's
>> > challenge
>> > Build the coolest Linux based applications with Moblin SDK & win great
>> > prizes
>> > Grand prize is a trip for two to an Open Source event anywhere in the
>> > world
>> > http://moblin-contest.org/redirect.php?banner_id=100&url=/
>> > _______________________________________________
>> > Wrapper-user mailing list
>> > Wra...@li...
>> > https://lists.sourceforge.net/lists/listinfo/wrapper-user
>> >
>> >
>>
>> -------------------------------------------------------------------------
>> This SF.Net email is sponsored by the Moblin Your Move Developer's
>> challenge
>> Build the coolest Linux based applications with Moblin SDK & win great
>> prizes
>> Grand prize is a trip for two to an Open Source event anywhere in the
>> world
>> http://moblin-contest.org/redirect.php?banner_id=100&url=/
>> _______________________________________________
>> Wrapper-user mailing list
>> Wra...@li...
>> https://lists.sourceforge.net/lists/listinfo/wrapper-user
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Wrapper-user mailing list
> Wra...@li...
> https://lists.sourceforge.net/lists/listinfo/wrapper-user
>
>