Bug 99123

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User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)

Description of problem:
 An attribute caching problem causes incredibly slow nfs3 performance, making 
3rd party applications *painful* to use.  This problem is similar to bug 
#67543, but with that bug both nfs2 and nfs3 are broken. In this bug, it 
appears that only nfs3 mounts are affected and not nfs2.  

 This problem is causing a great deal of pain within our production 
environment.  Launching maya takes nearly 4 minutes and accessing its plugin 
manager takes over 6 minutes.  The load times under a vanilla 7.2 (2.4.10-7) 
kernel are 30 seconds and 5 seconds respectively.  

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Create three files in a nfs3 mounted directory (test, test2, test3).

2. Run the following perl script, which will demonstrate the problem. 

-----------------------------------------------
#!/usr/bin/perl

undef $done;
$go=0;
while (! $done) {
  chdir("/some/nfs3/mounted/directory");
  @test = stat("test");
  @test2 = stat("test2");
  @test3 = stat("test3");
  $go++;
  if ($go == 10000) {$done = "yeppers"};
}

3. Repeat step 2, but this time use nfs2 mounts and notice the difference in 
times.

    

Actual Results:   The nf3 results are *much* slower tham the nfs2 results.

Expected Results:  I would expect to see no noticeable difference between nfs2 
and nfs3 mounted directories.

Ad