i386/91857: abnormal high load using apache2+mysql+php 5

[Arnold Lee]

>Number:         91857
>Category:       i386
>Synopsis:       abnormal high load using apache2+mysql+php 5
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 16 04:50:02 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Arnold Lee
>Release:        6.0 Stable
>Organization:
>Environment:
FreeBSD BSD6 6.0-STABLE FreeBSD 6.0-STABLE #1: Mon Nov 28 12:55:49 UTC 2005     root at BSD6:/usr/src/sys/i386/compile/Arnold  i386
>Description:
My cpu is celeron 677MHz, 128M SDRAM. I use apache2 + mysql 5 + php 5, and I use default configure files. I wrote a php script file, in which there is only one simple mysql_query. But in an another computer in the same lan, when I open ie and explored this php page, I pushed "F5". When I run "top " in bsd box, it shows that idle time is nearly 0. what happened? and how to resolve this problem?
>How-To-Repeat:
              
>Fix:
              
>Release-Note:
>Audit-Trail:
>Unformatted: