httpd core file truncated

[Zippy Zeppoli <zippyzeppoli@xxxxxxxxx>]

I am trying to read a core file from http/php.
I have set the ulimit 
to unlimited for the apache user in limits.conf, I have also added 
ulimit -c unlimited to the user's .bashrc.

For some reason, my 
core files still say they are truncated. I'm not sure why. I have debug 
symbols for httpd and freetds (but not php). 

Here is the error:
BFD: Warning: /tmp/core.10242 is truncated: expected core file size >= 576610304, found: 11689984.
BFD: Warning: /tmp/core.10242 is truncated: expected core file size >= 576610304, found: 11689984.
[New Thread 10242]
[New Thread 10753]
Core was generated by `/usr/sbin/httpd'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002aaaac7f8b60 in ?? ()
"/tmp/core.10242" is a core file.
Please specify an executable to debug.

any help is appreciated.