Re: [Wrapper-user] what is the memory and cpu footprint of the wrapper itself?

[Jennifer K. <jk...@si...>]

I ran my java application through optimize-it and looked at the % of 
time the CPU spent in the Wrapper Manager - which is a static object in 
my VM since I reference it to call restarts and also to enable and 
disable monitoring pings.  I also ran the WrapperSimpleApp w/ it 
calling my app under optimize-it.

I found that under 3.0.5 the % of time the CPU spent in wrapper code  
was about 15%
under 3.1.0 (with ticktimer on) the % of time the CPU spent in wrapper 
code was about 38%

I then used purify to run the wrapper.exe to look for leaks on that 
side of things, and I didn't find any particular problems..

Thanks for the memory footprint information and the expected CPU load 
info.

Jennifer



On May 26, 2004, at 1:04 AM, Leif Mortenson wrote:

> Jennifer,
>    Memory usage has been going up slightly with each release as new 
> features are
> added.   But I try to keep the footprint as small as possible.   One 
> Windows,
> 3.1.0 requires around 1700KB this depends on the application and the 
> output sent
> to the console however.  Most internal buffers are dynamic.
>
>    There was a slight performance hit in 3.1.0 when processing lots 
> and lots of console
> output.  This was caused by a fix to a synchronization problem with 
> internal buffers
> used by the logging system.   The hit was very minor however.
>    What are you doing that you are even able to measure such a change. 
> Even when sending lots and lots of output to the console the Wrapper 
> CPU is still
> usually down around 1-2% of total load.   When there is no output it 
> always shows
> as 0%
>
>    As for the memory of your JVM.   The Wrapper requires a slight 
> amount of
> memory on top of what your application would normally use for its own 
> classes,
> but this is quite minor.   Your should be able to tune the max memory 
> value
> depending on your application.  I have small applications that run in 
> just a few
> MB where setting the max memory to 8MB works just fine.  Could probably
> even be set to 4MB or so.
>
>    Let me know if I did not answer you.
>
> Cheers,
> Leif
>
> Jennifer Kolar wrote:
>
>> For wrapper 3.1.0 and 3.0.5 under Windows 2000-- using sun's JVM 
>> 1.4.2  what amount of memory do I need to allocate for the
>> wrapper itself?
>> Should I expect this number to be higher under 3.1.0?
>>
>> what about CPU usage. what % of CPU usage should I expect w/ default 
>> configuration parameters?
>> I am finding that the CPU load from 3.1.0 is about 20% higher from 
>> the wrapper  than with 3.0.5.
>>
>> I am running multiple instances of processes wrapped with the wrapper 
>> and thus can't just allocate a huge amount of memory to each process.
>>
>> Thanks,
>> Jennifer
>
>
>
>
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