Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> writes:
> On 1/24/15 3:31 PM, Tom Lane wrote:
>> Another idea is to teach Valgrind that whenever a backend reduces its
>> pin count on a shared buffer to zero, that buffer should become undefined
>> memory.
> <paranoia>
> Shouldn't this technically tie in with ResourceOwners?
No. ResourceOwner is just a mechanism to ensure that we remember to call
UnpinBuffer, it has no impact on what the semantics of the pin count are.
The *instant* the pin count goes to zero, another backend is entitled to
recycle that buffer for some other purpose.
regards, tom lane