"Qingqing Zhou" <[EMAIL PROTECTED]> writes:
> Another alternative might use PG_TRY/PG_CATCH to make sure that the
> semaphore is released. But seems this costs too much ...

I agree.  LWLockAcquire is a hot-spot already.

Maybe we *should* make it a PANIC.  Thoughts?

                        regards, tom lane

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