Apache + SVN WebDAV slowdown problems

[ravloony]

Hi all,

I've installed apache on my server, and I'm using it to access my svn server over webdav. The problem is that sometimes, using svn can be really slow, or even not work, for no reason I can ascertain. Restarting apache corrects the problem for a bit, but it always comes back. Anybody have this problem?

My apache install opts:

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[ebuild   R   ] www-servers/apache-2.2.10  USE="ldap ssl static threads -debug -doc (-selinux) -sni -suexec" APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif speling status unique_id userdir usertrack vhost_alias -asis -authn_alias -cern_meta -charset_lite -dumpio -log_forensic -proxy_ftp -substitute -version" APACHE2_MPMS="event -itk -peruser -prefork -worker" 0 kB

It's running with

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APACHE2_OPTS="-D DEFAULT_VHOST -D PHP5 -D USERDIR -D LOG_SQL -D INFO -D DAV -D SVN"

I'm at a bit of a loss here, so any help would be greatly appreciated.

Thanks in advance.

[stan666]

Are there any log entries in error log or access log you could post?

[ravloony]

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 - - [02/May/2009:01:11:35 +0200] "OPTIONS /svn/repos/nsga/trunk HTTP/1.1" 200 194 "-" "SVN/1.6.1 (r37116) neon/0.28.4"
 - - [02/May/2009:01:11:35 +0200] "PROPFIND /svn/repos/nsga/trunk HTTP/1.1" 207 698 "-" "SVN/1.6.1 (r37116) neon/0.28.4"
 - - [02/May/2009:01:11:35 +0200] "PROPFIND /svn/repos/nsga/trunk HTTP/1.1" 207 698 "-" "SVN/1.6.1 (r37116) neon/0.28.4"
 - - [02/May/2009:01:11:36 +0200] "PROPFIND /svn/repos/nsga/!svn/vcc/default HTTP/1.1" 207 411 "-" "SVN/1.6.1 (r37116) neon/0.28.4"
 - - [02/May/2009:01:11:36 +0200] "PROPFIND /svn/repos/nsga/!svn/bln/83 HTTP/1.1" 207 464 "-" "SVN/1.6.1 (r37116) neon/0.28.4"
 - - [02/May/2009:01:11:36 +0200] "REPORT /svn/repos/nsga/!svn/vcc/default HTTP/1.1" 200 634 "-" "SVN/1.6.1 (r37116) neon/0.28.4"

This is from the access log after an update. There is nothing in the error log at all connected to svn.

[stan666]

maybe "curl -vv <URL>" gives some more information? If not pls post your apache config (not the whole config, just your svn-related stuff )
(by writing this i assume that: 1. the server load is normal and you do not have hundreds of apache2 processes/threads running (can happen if you are using the wrong "worker" which can make you DOS your own server ), 2. there is enough disk space - I know these two facts are rather obvious, I only mention this stuff because it already happend to me )

[ravloony]

content of mod_dav_svn.conf:

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<IfDefine SVN>
        <IfModule !mod_dav_svn.c>
                LoadModule dav_svn_module       modules/mod_dav_svn.so
        </IfModule>
        <Location /svn/repos>
                DAV svn
                SVNParentPath /var/svn/repos
                #SSLRequireSSL
                AuthType Basic
                AuthName "Super Duper SVN Repository"
                AuthUserFile /var/svn/conf/svnusers
                #AuthzSVNAccessFile /var/svn/conf/svnpolicy
                <LimitExcept GET PROPFIND OPTIONS REPORT>
                        Require valid-user
                </LimitExcept>
                SVNIndexXSLT /svnindex.xsl
        </Location>
        <IfDefine SVN_AUTHZ>
                <IfModule !mod_authz_svn.c>
                        LoadModule authz_svn_module     modules/mod_authz_svn.so
                </IfModule>
        </IfDefine>
</IfDefine>

curl -vv gives:

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<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="/svnindex.xsl"?>
<!DOCTYPE svn [
  <!ELEMENT svn   (index)>
  <!ATTLIST svn   version CDATA #REQUIRED
                  href    CDATA #REQUIRED>
  <!ELEMENT index (updir?, (file | dir)*)>
  <!ATTLIST index name    CDATA #IMPLIED
                  path    CDATA #IMPLIED
                  rev     CDATA #IMPLIED
                  base    CDATA #IMPLIED>
  <!ELEMENT updir EMPTY>
  <!ELEMENT file  EMPTY>
  <!ATTLIST file  name    CDATA #REQUIRED
                  href    CDATA #REQUIRED>
  <!ELEMENT dir   EMPTY>
  <!ATTLIST dir   name    CDATA #REQUIRED
                  href    CDATA #REQUIRED>
]>
<svn version="1.5.5 (r34862)"
     href="http://subversion.tigris.org/">
  <index rev="83" path="/" base="nsga">
    <dir name="tags" href="tags/" />
    <dir name="trunk" href="trunk/" />
  </index>
</svn>

Apache doesn't seem overloaded, and is using about 70M per thread according to htop. There's plenty of disk space left.

[stan666]

Your config looks sane, I'm running out of ideas...