apd_set_socket_session_trace (string(ip_address or unix socket file), intsocket_type, intport, intdebug_level)
Connects to the tcp server (eg. tcplisten) specified IP or Unix Domain socket (like a file), and sends debugging data to the socket. You can use any port, but higher numbers are better as most of the lower numbers may be used by other system services.
the socket_type can be APD_AF_UNIX (for file based sockets) or APD_AF_INET (for standard tcp/ip)
debug_level is an integer which is formed by adding together the following values:
FUNCTION_TRACE 1 ARGS_TRACE 2 ASSIGNMENT_TRACE 4 STATEMENT_TRACE 8 MEMORY_TRACE 16 TIMING_TRACE 32 SUMMARY_TRACE 64
I would seriously not recommend setting the value to 'zero' to start with, and use the breakpoint methods to start debugging at a specific place in the file.
Example 1. apd_set_socket_session_trace() example