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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 23567] - splitting brigades eats memory proprotional to number of FLUSH buckets
Date Wed, 12 Jan 2005 10:33:40 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=23567


jorton@redhat.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Huge memory usage           |splitting brigades eats
                   |                            |memory proprotional to
                   |                            |number of FLUSH buckets
            Version|2.0.46                      |2.0-HEAD




------- Additional Comments From jorton@redhat.com  2005-01-12 11:33 -------
Just brain-dumping, the design issue here is, per Jeff's analysis and subsequent
discussion:

1. brigades are allocated out of pools
2. every call to apr_brigade_split allocates a new brigade
3. every time a FLUSH bucket it sent down the filter stack, it causes at least
one call to apr_brigade_split

fixes for this could be either:

fix (1), allocate brigades out of the bucket-allocator so that they can really
be free'd (very intrusive since many filters presume brigades are never really
destroyed)

fix (3), adjust all filters to ensure that they don't allocate a number of
brigades per request (and hence, memory allocated) which is proportional to
number of FLUSH buckets sent.


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