mod_dav_svn and multiple apache processes

Hi,

Please help me out in understanding internals of BDB-based subversion.

When committing files to my repository over HTTP, I noticed that Apache uses multiple processes to serve my commit. Here I've got a couple of questions:
1) Shouldn't Apache use only one process per SVN transaction? I thought it was the case.
2) How does mod_dav_svn distribute commit work among processes?
3) May mod_dav_svn uses different svn_fs_t objects for writing the same file to the SVN's backend?
4) How mod_dav_svn decides when to open and close svn_fs_t* object 
5) Where I can read more about mod_dav_svn (except the code)


I know that I should better use svn users mailing list, but I never get replies from there...

Thanks in advance!

Best,
Vyacheslav

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