From: Matthew Clark <mclark@drmatthewclark.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-bugs@lists.postgresql.org <pgsql-bugs@lists.postgresql.org>
Subject: Re: server crash on raspberry pi for large queries
Date: Tue, 20 Aug 2024 19:18:42 +0000 (UTC)
Message-ID: <90650442.10108278.1724181522516@mail.yahoo.com> (raw)
In-Reply-To: <1527796.1724159772@sss.pgh.pa.us>
References: <2123352386.9759142.1724114730509.ref@mail.yahoo.com>
<2123352386.9759142.1724114730509@mail.yahoo.com>
<1527796.1724159772@sss.pgh.pa.us>
OS: Linux pi 6.6.31+rpt-rpi-v6 #1 Raspbian 1:6.6.31-1+rpt1 (2024-05-29) armv6l GNU/Linux
I can try to make a test case, essentially a large table, then "select count(*)" from table. The select works for smaller tables.
I'm using the build of postgresql packaged with the OS version above; from the apt repository and installed with "apt install postgresql". repository -
deb [ arch=armhf ] http://raspbian.raspberrypi.com/raspbian/ bookworm main contrib non-free rpi
postgres --version
postgres (PostgreSQL) 15.8 (Raspbian 15.8-0+deb12u1)
On Tuesday, August 20, 2024 at 09:16:16 AM EDT, Tom Lane <tgl@sss.pgh.pa.us> wrote:
Matthew Clark <mclark@drmatthewclark.com> writes:
> issue: when issuing a large query , e.g. "Select count(*) from temperature" on a table with > 150M rows the system crashes.
> example error: LOG: server process (PID 20037) was terminated by signal 4: Illegal instruction no more diagnostic information is generated.
> Workaround : this stops happening when jit_above_cost is set to -1 in postgresql.conf After changing this setting the problem stops.
What this sounds like is a memory leak in the JIT stuff. We fixed
one such issue last year, but perhaps there's more. Can you provide
a self-contained test case? Also, please be more specific about
which Linux version you are using, and which LLVM version.
regards, tom lane
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Cc: mclark@drmatthewclark.com, tgl@sss.pgh.pa.us, pgsql-bugs@lists.postgresql.org
Subject: Re: server crash on raspberry pi for large queries
In-Reply-To: <90650442.10108278.1724181522516@mail.yahoo.com>
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