core dump with No symbol table info available.

[nik600 <nik600@xxxxxxxxx>]

Dear all

i'm not able to debug some core dump on a debian6 server.

- i've read page at http://httpd.apache.org/dev/debugging.html

- i've installed 

ii  apache2-dbg                         2.2.16-6+squeeze14           Apache debugging symbols

ii  libapr1-dbg                         1.4.2-6+squeeze4             The Apache Portable Runtime Library - Debugging Symbols

ii  libaprutil1-dbg                     1.3.9+dfsg-5                 The Apache Portable Runtime Utility Library - Debugging Symbols

i use the command:

gdb /usr/sbin/apache2 -c core.20141126

but when i do a 

gdb>thread apply all bt full

gdb>bt full

i have only messages with No symbol table info available.

ulimit command gives me "unlimited".

Any hint or suggestion?

Thanks to all in advance.

Bye

/*************/
nik600
http://www.kumbe.it