lots httpd processes with lockf

[Ron]

I recently updated from FreeBSD7 to FreeBSD9.  The server runs (and has 
always run) apache-2.2.

When I do a 'top' I see around 30 entries that all look like this:

32016 www              1  20    0   321M 40744K lockf   1   0:13  0.00% 
httpd

When I do a ps and grep for www, I get back ~62 entries that look like 
this:

www            81139   0.0  0.9 324456  36784  ??  I     7:50AM     
0:03.49 /usr/local/sbin/httpd -DNOHTTPACCEPT

My hardware is;

hw.machine: amd64
hw.model: Intel(R) Core(TM)2 Quad CPU    Q9550  @ 2.83GHz
hw.ncpu: 4
hw.machine_arch: amd64

Is it normal to see that many httpd process and lockf entries?  Or do I 
have something incorrectly configured.

I don't know if this started happening after 9.X, it might have been 
doing this before.

Ron