| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Reduce ProcArrayLock contention |
| Date: | 2015-07-27 15:17:31 |
| Message-ID: | CA+TgmoYLpPDG1f=bMrOZFKM48UaULT4RUtOO3=CTmaHRc5pv+A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Jul 25, 2015 at 12:42 AM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> I thought that internal API will automatically take care of it,
> example for msvc it uses _InterlockedCompareExchange64
> which if doesn't work on 32-bit systems or is not defined, then
> we have to use 32-bit version, but I am not certain about
> that fact.
Instead of using pg_atomic_uint64, how about using pg_atomic_uint32
and storing the pgprocno rather than the pointer directly? Then it
can work the same way (and be the same size) on every platform.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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