Local pools have been integrated to mod_axis2 in Axis2/C trunk.
You may run the tests again and see the improved memory footprint.
Samisa...
Samisa Abeysinghe wrote:
Alex Bolgarov wrote:
On Mon, Mar 31, 2008 at 11:17 PM, Uthaiyashankar <[EMAIL PROTECTED]>
wrote:
I doubt whether it is a memory leak. When using mod_axis2, memory
management is done by apache apr. Memory is released only when
pools are
destroyed. Memory will not be released when calling AXIS2_FREE.
(axis2_module_free is implemented in mod_axis2.c:412 and it is an
empty
method unless the pool associated with is global shared pool).
Well, we can of course discuss the meaning of a term 'memory leak',
but what happens here is awfully close to any sensible definition :)
Thank you for pointing out that the mod_axis2 does not really release
memory by design.
What we are using is APR model of pools. So you cannot say that we are
not releasing memory by design. We are depending on APR pools to
release memory by design.
We have looked deep into this issue in the past, and proven that the
request pool is reclaimed by main pool upon request completion.
How do you think what happens if I change the
allocator used by mod_axis2 to use malloc()/free(), not the APR's
apr_pool_...() functions? Will the memory leak go away?.. Actually,
this is exactly what I'm going to do. I have some experience in
developing Apache httpd modules, and I write them in C++ and freely
use new/delete operators, so I know that using a memory allocator
other then APR's pool functions in the httpd process is OK.
If you go and discuss this with httpd or apr list, they will sure tell
you that this is the wrong way to do that.
There are better ways of doing this, like using using local pools,
which we are going to implement soon.
Samisa...
I will
report my findings here, hopefully in a couple of days.
Thank you,
alex.
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Samisa Abeysinghe
Software Architect; WSO2 Inc.
http://www.wso2.com/ - "Oxygenating the Web Service Platform."
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