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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 12099] New: - Extremely slow downloads from Solaris 8 (and other?) clients
Date Tue, 27 Aug 2002 17:57:01 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=12099

Extremely slow downloads from Solaris 8 (and other?) clients

           Summary: Extremely slow downloads from Solaris 8 (and other?)
                    clients
           Product: Apache httpd-2.0
           Version: 2.0.40
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Critical
          Priority: Other
         Component: Core
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: jessh@ptc.com


Downloads from Apache 2.0.40 servers running on Windows are extremely slow 
(e.g. on the order of 120K/sec) when performed from Solaris clients.  [Note 
that Apache 1.3.26 has a similar issue but only achieves 80K/sec!]

The same servers (on the same network segments) produce downloads at 8MB per 
second when the client is a Windows or Linux client.  Downloads from IIS are at 
8-9MB/sec regardless of which of these clients is used.  Downloads from Tomcat 
(standalone) are also on the order of 8MB/sec for all these clients.

The numbers involved suggest a Nagle algorithm issue.  My (naive) scan of the 
Apache 2.0.40 sources suggest that a specific effort is made to avoid setting 
NODELAY (while Apache 1.3.26 appears to set it).  Yet the fact that contrasting 
performance when other clients or IIS or Tomcat are used suggests a serious, 
yet solvable issue in Apache 2.0.40 specific to Windows.

Given that Apache 2 is making a serious effort towards supporting Windows, it 
would seem especially urgent to address this issue in Apache 2.

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