Actually, that's incorrect, and it's probably the same mistake that the original poster made. The flaw is that the memory address shown as part of the stringification of the reference is the *relative* memory address to that process. The operating system uses something called "virtual memory", which abstracts the actual *physical* memory location away from your processes. In truth, the physical memory addresses may change from time to time, as your process is swapped and paged and so on.

Anyway, here's a quick demo: 

prompt> perl -le 'my $pid = fork; my $x = [$pid]; print "$x->[0] -- $x
+"'
0 -- ARRAY(0x80d11ec)
24694 -- ARRAY(0x80d11ec)
prompt>

[download]
You can see that each process has it's own array, with the reference stored in $x, yet in both processes, the memory address appears the same. 
------------
:Wq
Not an editor command: Wq

[download]

In reply to Re^3: Using fork with DBI to create simultaneous db connections. by etcshadow
in thread Using fork with DBI to create simultaneous db connections. by altern8

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