From: Sharpe, John (John.Sharpe@vuinteractive.com)
Date: Thu Oct 10 2002 - 19:16:07 EDT
We are experiencing problems with hundreds of processes trying to read the
same file.
The processes trying to read the file are both apache and/or ncftpd daemons.
>From our analysis, it seems the problem lies within the filesystem or a
kernel parameter/limitation.
Once the number of processes trying to read the file goes over a certain
threshold, all new processes that try to open that file hang. Also, when it
is in this state, if you try to 'cp' the file from the command line, your
'cp' will hang. If you try to access other files on the file system, with
any of the mentioned processes, it works normally.
The machine is not running a load average of between 1 and 2. 'sar' reports
low iowait an d plenty of idle cpu time. Machine specs are:
E450 w/4x400mhz cpus, 4gb of memory, Solaris 8 with Veritas fs on the
mention fs.
We have found no information with sun, etc. I will summarize for the group.
John Sharpe
Unix Systems
Vivendi Universal Games
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