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From Joshua Slive <>
Subject Re: [users@httpd] Performance problems with Apache2 under Solaris 9
Date Tue, 17 Jun 2003 16:00:42 GMT

On Tue, 17 Jun 2003, Felix Seeger wrote:
> I have compiled Apache httpd 2.0.46 under Solaris 9 on Netra T1 200
> (UltraSPARC-IIe) with gcc 2.95.3. Latest patch cluster from sun is installed.
> The server works well, but when I download a zip file (for testing I use a
> 500MB one) cpu usage jumps to 100%.
> I only get between 300 and 800kb/s on my local net (100baseTx-FD)
> On the sun the CPU states from top look like this:
> CPU states:  0.0% idle,  0.0% user, 97.7% kernel,  2.3% iowait,  0.0% swap

Obviously some sort of kernel issue, not directly to do with the apache
source code.  A couple suggestions:

Try using the EnableSendfile directive to disable the use of the
sendfile() system call and see if that helps.

Try strace on an affected httpd to see what it is doing.


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