Thanks a lot
On Thu 27 Aug, 2020, 12:23 PM Laurenz Albe, <laurenz.albe@xxxxxxxxxxx> wrote:
On Thu, 2020-08-27 at 10:10 +0530, Hemil Ruparel wrote:
> I was playing with Advisory locks. I opened three connections to the database And obtained
> a lock with the same key. I noticed that the locks were obtained in the order of requests.
> I was wondering whether the locks are guaranteed to be First Come First Serve and can this
> behaviour be relied upon.
Yes - lock requests that block are queued, with later lock requests queued behind previous
ones. Once a lock gets free, the first in line gets it.
This is the same for all heavyweight locks in PostgreSQL.
Yours,
Laurenz Albe
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