Brendan Duddridge <[EMAIL PROTECTED]> writes:
> Do you mean do a kill -QUIT on the postgres process in order to
> generate a stack trace?
Not at all! I'm talking about tracing the kernel calls it's making.
Depending on your platform, the tool for this is called strace,
ktrace, truss, or maybe even just trace. With strace you'd do
something like
strace -p PID-of-process 2>outfile
... wait 30 sec or so ...
control-C
Not sure about the APIs for the others but they're probably roughly
similar ... read the man page ...
regards, tom lane
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
