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Date: Wed, 07 Apr 2021 09:31:54 -0700
From: "Andres Freund" <andres@anarazel.de>
To: "Jaime Casanova" <jcasanov@systemguards.com.ec>
Cc: "Kurt Roeckx" <kurt@roeckx.be>, "Tom Lane" <tgl@sss.pgh.pa.us>,
 pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #16707: Memory leak
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Hi,

On Wed, Apr 7, 2021, at 09:28, Jaime Casanova wrote:
> On Tue, Nov 10, 2020 at 05:38:08PM -0800, Andres Freund wrote:
> > Hi,
> > 
> > On 2020-11-10 23:45:16 +0100, Kurt Roeckx wrote:
> > > On Tue, Nov 10, 2020 at 08:50:39PM +0100, Kurt Roeckx wrote:
> > > > > There's one known (slow) memory leak in the JIT code / LLVM. Could you
> > > > > check if the issue vanishes if you disable JIT (jit = 0)?
> > > > 
> > > > I've just restarted it with jit = 0.
> > > 
> > > It's been about 3 hours since the restart, and it looks much
> > > better, it seems to be solved.
> > 
> > Hm, darn. Any chance you could check if the leak is present if you turn
> > on jit again, but disable inlining with jit_inline_above_cost=-1? If
> > that still fixes the leak I think I know the issue / have a reproducer
> > already...
> > 
> 
> I was bit by this too while testing something.  I thought it could have been
> a problem caused by the support of llvm 12? but given that this report
> is for pg12, it seems this is older than that.

I hope to fix it soon - I have two different mostly working fixes. I'll get back to it once the dust around the freeze settles.

Andres