He there, I don't have any clue oft he development of svn, nevertheless I try to make some assumptions. Please correct me if I'm wrong.
I might obverved a problem: I'm usging Apache mod_dav_svn 1.8.10 on windows 7. In my apache error log files I found the errors: (20014)Internal error: -Can't open file 'C:\\ServerData\\svn\\repos\\db\\rev-prop-atomics.mutex': access denied (20014)Internal error: Revprop caching for 'C:/ServerData/svn/repos/db' disabled because SHM infrastructure for revprop caching failed to initialize. They appear when I open TortoiseSvn-Repo-Browser (which means that a lot of request are send tot he server. (maybe even parallel? I don't know) The apache run under local System account. I've checked the file permissions on all repo-files for user SYSTEM. Everything is ok. Then I used "Process Monitor" from Sysinternals to check the file access on the file above (http://technet.microsoft.com/en-us/sysinternals/bb842062.aspx) I saw hundreds of failures of file creation, with the result "DELETE PENDING" 20:08:43,2589409 httpd.exe 3728 CreateFile C:\ServerData\svn\repos\db\rev-prop-atomics.mutex DELETE PENDING Desired Access: Read Attributes, Delete, Disposition: Open, Options: Non- Googling around I found out that an attempt to create a file with a "Pending Delete" can lead to an "access denied" result. (e.g. http://stackoverflow.com/questions/3764072/c-win32-how-to-wait-for-a-pending-delete-to-complete) Is there a relation to the error-Log-Message? The timing said so. I suppose the create/lock/unlock/delete command on that file are used for synchronization. What are the performance costs of synchronization with the file? When I I see the error file creation failure I get the feeling there is a performance loss there. The Tortoise-SVN-Repo browser in our setting is quit slow. Is there a relation? Maybe a named mutex of he Win32-API would be the better choice for synchonization because they are made for that reason. (http://msdn.microsoft.com/en-us/library/windows/desktop/ms682411(v=vs.85).aspx) But as a said I dont know anyting oft he svn-development. I'm curious what the expert's say to my observation. Looking forward for any response. Thank you. Cheers Matthias
