"Scott Marlowe" <scott.marlowe@gmail.com> writes:
> Tom, is it possible the backend was doing something that couldn't be
> immediately interrupted, like a long wait on IO or something?
Sherlock Holmes said that theorizing in advance of the data is a capital
mistake...
What we can be reasonably certain of is that that backend wasn't
reaching any CHECK_FOR_INTERRUPTS() macros. Whether it was hung up
waiting for something, or caught in a tight loop somewhere, is
impossible to say without more data than we have. AFAIR the OP didn't
even mention whether the backend appeared to be consuming CPU cycles
(which'd be a pretty fair tip about which of those to believe, but still
not enough to guess *where* the problem is). A gdb backtrace would tell
us more.
regards, tom lane
