George Gensure escribió:
> I've done a quick write up for reload time re****ting from the
> administration TODO. I was a little paranoid with the locking, but
> didn't want problems to occur with signals on the postmaster and the
> read side.
I'd say too much -- postmaster runs with signals blocked all the time
(except during select()) so this is not necessary there.
Regarding the locking on backends, I admit I am not sure if this is
really a problem enough that you need a spinlock for it. Anyway we tend
not to use spinlocks too much -- probably an LWLock would be more
apropos, if a lock is really needed. (A bigger question is whether the
reload time should be local for each backend, or exposed globally
through MyProc. I don't think it's interesting enough to warrant that,
but perhaps others think differently.)
Lastly, I didn't read the patch close enough to tell if it would work on
both the EXEC_BACKEND case and the regular one.
--
Alvaro Herrera
http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
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