Re: [HACKERS] Moving relation extension locks out of heavyweight lock manager

On Fri, May 12, 2017 at 9:14 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> On Wed, May 10, 2017 at 8:39 PM, Masahiko Sawada <sawada.mshk@gmail.com> wrote:
>>> ... I'd like to propose to change relation
>>> extension lock management so that it works using LWLock instead.
>
>> That's not a good idea because it'll make the code that executes while
>> holding that lock noninterruptible.
>
> Is that really a problem?  We typically only hold it over one kernel call,
> which ought to be noninterruptible anyway.
>

During parallel bulk load operations, I think we hold it over multiple
kernel calls.

-- 
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com