Attached a patch with a new CF entry: https://commitfest.postgresql.org/44/4516/
Regards,
Sami Imseih
Amazon Web Services (AWS)
0001-v1-Fix-false-report-of-wraparound-in-pg_serial.patch
Description: 0001-v1-Fix-false-report-of-wraparound-in-pg_serial.patch
On Fri, Aug 25, 2023 at 10:10 AM Andres Freund wrote:
> Let's see what the buildfarm says - it's not inconceivable that it'll show
> some issues.
Apparently Solaris doesn't like "cp -a", per animal "margay". I think
"cp -RPp" should be enough everywhere?
On Wed, Aug 23, 2023 at 4:21 PM Dilip Kumar wrote:
>
> On Wed, Aug 23, 2023 at 3:38 PM shveta malik wrote:
> >
> I have reviewed the v12-0002 patch and I have some comments. I see the
> latest version posted sometime back and if any of this comment is
> already fixed in this version then feel
On Fri, Aug 18, 2023 at 10:12 AM Dilip Kumar wrote:
>
> On Fri, Aug 18, 2023 at 5:24 AM Michael Paquier wrote:
> >
> > On Thu, Aug 17, 2023 at 01:11:50PM +0530, Dilip Kumar wrote:
> > > Yeah right, actually I was confused, I assumed it will return the
> > > start LSN of the record. And I do not
On Fri, Aug 25, 2023 at 3:54 PM Pavel Stehule wrote:
> today build is broken on my Fedora 39
Has commit 252dcb32 somehow upset some kind of bleeding edge btrfs
filesystem? That's a wild guess and I can't really imagine how but
apparently your database files are totally messed up...
Hi,
I've just noticed this warning when building on Debian 12:
In file included from
/usr/lib/llvm-14/include/llvm/Analysis/ModuleSummaryAnalysis.h:17,
from llvmjit_inline.cpp:51:
/usr/lib/llvm-14/include/llvm/IR/ModuleSummaryIndex.h: In constructor
On Tue, Aug 22, 2023 at 9:41 PM Vik Fearing wrote:
>
>
> I am struggling to find documentation on how to build the pdfs with
> meson. Any pointers?
> --
> Vik Fearing
>
>
>
ninja docs:
https://wiki.postgresql.org/wiki/Meson#Meson_documentation
ninja alldocs. which take some time, build all
On Thu, Aug 24, 2023 at 12:45 PM Peter Eisentraut wrote:
>
> I suggest we rename this setting to something starting with debug_.
> Right now, the name looks much too tempting for users to fiddle with. I
> think this is similar to force_parallel_mode.
>
+1. How about debug_logical_replication?
pá 25. 8. 2023 v 6:21 odesílatel Julien Rouhaud napsal:
> Hi,
>
> On Thu, Aug 24, 2023 at 12:55:30PM -0700, Gurjeet Singh wrote:
> > Currently, psql exits if a database connection is not established when
> > psql is launched.
> >
> > Sometimes it may be useful to launch psql without connecting
Hi,
On Thu, Aug 24, 2023 at 12:55:30PM -0700, Gurjeet Singh wrote:
> Currently, psql exits if a database connection is not established when
> psql is launched.
>
> Sometimes it may be useful to launch psql without connecting to the
> database. For example, a user may choose to start psql and then
On Fri, Aug 25, 2023 at 9:09 AM Peter Smith wrote:
>
> On Thu, Aug 24, 2023 at 8:18 PM Amit Kapila wrote:
> >
> > On Thu, Aug 24, 2023 at 1:20 PM Alvaro Herrera
> > wrote:
> > >
> > > On 2023-Aug-24, Amit Kapila wrote:
> > >
> > > > On Wed, Aug 23, 2023 at 1:31 PM Alvaro Herrera
> > > >
Hi
today build is broken on my Fedora 39
Regards
Pavel
make[2]: Opouští se adresář
„/home/pavel/src/postgresql.master/src/bin/initdb“
make -C pg_amcheck check
make[2]: Vstupuje se do adresáře
„/home/pavel/src/postgresql.master/src/bin/pg_amcheck“
echo "# +++ tap check in src/bin/pg_amcheck
On Fri, Aug 25, 2023 at 12:09 PM Hayato Kuroda (Fujitsu)
wrote:
>
> Dear Peter,
>
> > FYI, the v24-0003 tests for pg_upgrade did not work for me:
>
> Hmm, I ran tests more than 1hr but could not reproduce the failure.
> cfbot also said OK multiple times...
>
Today I rebuilt everything clean from
On Thu, Aug 24, 2023 at 8:18 PM Amit Kapila wrote:
>
> On Thu, Aug 24, 2023 at 1:20 PM Alvaro Herrera
> wrote:
> >
> > On 2023-Aug-24, Amit Kapila wrote:
> >
> > > On Wed, Aug 23, 2023 at 1:31 PM Alvaro Herrera
> > > wrote:
> >
> > > > Hmm, I think if worker->in_use is false, we shouldn't
On Thu, 24 Aug 2023 at 18:25, Andres Freund wrote:
>
> On 2023-08-24 08:18:14 +0200, Peter Eisentraut wrote:
> > Surely meson should not be required to detect that?
>
> I think we should try to detect included files, due to the nasty and hard to
> debug issues that creates. I've spent quite a bit
On Thu, 24 Aug 2023 at 21:27, Richard Guo wrote:
> I performed some performance comparisons of the worst case with two
> tables as below:
>
> 1. The partitioned table has 1000 children, and 100,000 tuples in total.
>
> 2. The other table is designed that
> a) its tuples occupy every partition
On Thu Aug 24, 2023 at 2:55 PM CDT, Gurjeet Singh wrote:
Currently, psql exits if a database connection is not established when
psql is launched.
Sometimes it may be useful to launch psql without connecting to the
database. For example, a user may choose to start psql and then pipe
commands via
Dear Peter,
Thanks for reviewing! New patch could be available in [1].
> 1. check_for_lost_slots
>
> +
> +/*
> + * Verify that all logical replication slots are usable.
> + */
> +void
> +check_for_lost_slots(ClusterInfo *cluster)
>
> 1a.
> AFAIK we don't ever need to call this also for
Dear Peter,
Thanks for reviewing! PSA new version patch set.
Note again that 0001 patch was replaced to new one[1], but you do not have to
discuss that - it should be done in forked thread.
>
1.
+
+
+ All slots on the old cluster must be usable, i.e., there are no slots
+
Dear Peter,
> FYI, the v24-0003 tests for pg_upgrade did not work for me:
Hmm, I ran tests more than 1hr but could not reproduce the failure.
cfbot also said OK multiple times...
Could you please check source codes again and send log files
if it is still problem?
Best Regards,
Hayato Kuroda
On Thu, Aug 24, 2023 at 6:44 PM David Rowley wrote:
> I agree with this. I think Ranier's patch is good and we should apply
> it and backpatch it.
FWIW I'm pretty sure that it's impossible to run into problems here in
practice -- the minheap is allocated by palloc(), and the high
watermark
On Thu, Aug 24, 2023 at 6:18 PM Michael Paquier wrote:
> Still that looks entirely different to me. Here we have a problem
> where the number of free blocks stored may cause an overflow in the
> internal routine retrieving a free block, but your other thread
> is about long being not enough on
On Fri, 25 Aug 2023 at 13:19, Michael Paquier wrote:
> Still that looks entirely different to me. Here we have a problem
> where the number of free blocks stored may cause an overflow in the
> internal routine retrieving a free block, but your other thread
> is about long being not enough on
On Wed, Aug 23, 2023 at 09:36:01AM -0700, Jeff Davis wrote:
> On Tue, 2023-08-22 at 22:23 -0400, Bruce Momjian wrote:
> > > I notice that this item is still listed:
> > >
> > > * Determine the ICU default locale from the environment (Jeff
> > > Davis)
> > >
> > > But that was reverted as part
On Thu, Aug 24, 2023 at 08:57:58AM +0200, Peter Eisentraut wrote:
> During some refactoring I noticed that the field IndexInfo.ii_OpclassOptions
> is kind of useless. The IndexInfo struct is notionally an executor support
> node, but this field is not used in the executor or by the index AM code.
On Thu, Aug 24, 2023 at 12:13:18PM +0300, Sergey Shinderuk wrote:
> But I need to force malloc to fail at the right time during the test. I
> don't think I can make a stable and portable test from this.
LD_PRELOAD is the only thing I can think about, but that's very fancy.
Even with that, having
On Thu, Aug 24, 2023 at 05:33:15PM -0700, Peter Geoghegan wrote:
> I am in favor of fixing the problem. I don't quite recall what it was
> that made the discussion stall last time around.
I think that you mean this one:
2023年8月25日(金) 1:19 Nathan Bossart :
>
> On Wed, Aug 23, 2023 at 07:51:40PM -0700, Nathan Bossart wrote:
> > On Wed, Aug 23, 2023 at 07:32:06PM -0700, Nathan Bossart wrote:
> >> On Thu, Aug 24, 2023 at 10:22:49AM +0900, Ian Lawrence Barwick wrote:
> >>> Looking at the code, this is happening
On Thu, Aug 24, 2023 at 4:47 PM Michael Paquier wrote:
> > patch attached.
>
> Yeah, it looks like you're right here. Will do something about that.
This is a known issue. It has been discussed before.
I am in favor of fixing the problem. I don't quite recall what it was
that made the
On 8/2/23 12:35, Amul Sul wrote:
Hi,
Currently, we have an option to drop the expression of stored generated
columns
as:
ALTER [ COLUMN ] column_name DROP EXPRESSION [ IF EXISTS ]
But don't have support to update that expression. The attached patch
provides
that as:
ALTER [ COLUMN ]
On Thu, Aug 24, 2023 at 02:46:42PM -0300, Ranier Vilela wrote:
> With Windows both *long* and *int* are 4 bytes.
> But with Linux *long* is 8 bytes and *int* are 4 bytes.
And I recall that WIN32 is the only place where we treat long as 4
bytes.
> patch attached.
Yeah, it looks like you're right
Hi,
On 2023-08-23 10:10:31 +0200, Daniel Gustafsson wrote:
> > On 23 Aug 2023, at 03:17, Andres Freund wrote:
> > On 2023-08-22 23:47:24 +0200, Daniel Gustafsson wrote:
>
> >> My only small gripe is that I keep thinking about template databases for
> >> CREATE
> >> DATABASE when reading the
On Fri, Aug 25, 2023 at 3:15 AM Heikki Linnakangas wrote:
> In summary, RegisterBackgroundWorker() is doing some questionable and
> useless work, when a shared preload library is loaded to a backend
> process in EXEC_BACKEND mode.
Yeah. When I was working on 7389aad6 ("Use WaitEventSet API for
Currently, psql exits if a database connection is not established when
psql is launched.
Sometimes it may be useful to launch psql without connecting to the
database. For example, a user may choose to start psql and then pipe
commands via stdin, one of which may eventually perform the \connect
On Thu Aug 24, 2023 at 2:30 PM CDT, Tom Lane wrote:
"Tristan Partin" writes:
> On Wed Aug 23, 2023 at 2:24 PM CDT, Peter Eisentraut wrote:
>> Somewhere at PGCon, I forgot exactly where, maybe in the same meeting
>> where we talked about getting rid of distprep, we talked about that the
>>
"Tristan Partin" writes:
> On Wed Aug 23, 2023 at 2:24 PM CDT, Peter Eisentraut wrote:
>> Somewhere at PGCon, I forgot exactly where, maybe in the same meeting
>> where we talked about getting rid of distprep, we talked about that the
>> documentation builds are not reproducible (in the sense
Greetings,
* Robert Haas (robertmh...@gmail.com) wrote:
> On Fri, Aug 18, 2023 at 12:15 PM Nathan Bossart
> wrote:
> > I think I agree with Stephen. We routinely make changes that require
> > updates to extensions, and I doubt anyone is terribly wild about
> > maintaining two SLRU systems for
Hi,
On 2023-08-22 23:58:33 -0700, Andres Freund wrote:
> To make that possible, we need to make the compute resources for CI
> configurable on a per-repository basis. After experimenting with a bunch of
> ways to do that, I got stuck on that for a while. But since today we have
> sufficient
On 8/16/23 3:48 PM, Jonathan S. Katz wrote:
The date for PostgreSQL 16 Release Candidate 1 (RC1) is August 31, 2023.
Please ensure all open items[1] are completed and committed before
August 26, 2023 12:00 UTC.
Reminder: the RC1 open item[1] deadline is at August 26, 2023 @ 12:00 UTC.
On Wed Aug 23, 2023 at 2:24 PM CDT, Peter Eisentraut wrote:
Somewhere at PGCon, I forgot exactly where, maybe in the same meeting
where we talked about getting rid of distprep, we talked about that the
documentation builds are not reproducible (in the sense of
Hi,
nFreeBlocks stores the number of free blocks and
your type is *long*.
At Function ltsGetFreeBlock is locally stored in
heapsize wich type is *int*
With Windows both *long* and *int* are 4 bytes.
But with Linux *long* is 8 bytes and *int* are 4 bytes.
patch attached.
best regards,
Ranier
On Wed, Aug 23, 2023 at 09:35:20AM -0700, Nathan Bossart wrote:
> On Tue, Aug 22, 2023 at 07:06:23AM -0700, Nathan Bossart wrote:
>> On Tue, Aug 22, 2023 at 11:49:33AM +0200, Peter Eisentraut wrote:
>>> Let's change MESSAGE_WIDTH to 62 in v16, and then pursue the larger
>>> restructuring
>
>
> > Postgres, PostgreSQL, and the Elephant Logo (Slonik) are all registered
> > trademarks of the [PostgreSQL Community Association of Canada](
> https://www.postgres.ca).
>
> Isn't this just the "PostgreSQL Community Association", no Canada?
>
Certainly confusing from the website, but in the
Hi,
On Thu, 24 Aug 2023 at 00:48, Andres Freund wrote:
> > v3-0008-ci-switch-tasks-to-debugoptimized-build.patch:
> > Just thinking of possible optimizations and thought can't we create
> > something like 'buildtype: xxx' to override default buildtype using
> > .cirrus.star? This could be better
On Wed, 19 Jul 2023 at 15:13, Thom Brown wrote:
>
> On Wed, 19 Jul 2023, 13:58 Laurenz Albe, wrote:
>> I agree that the name "max_local_update" could be improved.
>> Perhaps "avoid_hot_above_size_mb".
>
> Or "hot_table_size_threshold" or "hot_update_limit"?
Although I like these names, it
On Wed, Aug 23, 2023 at 07:51:40PM -0700, Nathan Bossart wrote:
> On Wed, Aug 23, 2023 at 07:32:06PM -0700, Nathan Bossart wrote:
>> On Thu, Aug 24, 2023 at 10:22:49AM +0900, Ian Lawrence Barwick wrote:
>>> Looking at the code, this is happening because
>>> "pgstat_fetch_stat_local_beentry()"
>>>
Hi, i am trying to mutate a plan for a T_CreateTableAsStmt before it executes.
I've created a planner_hook_type hook, where i can see the plan that gets
executed as part of the AS of the query, where the CmdType is CMD_SELECT, and
its subplans are the plans for the actual select itself.
I've
On 2023-08-24 11:23, Jonathan S. Katz wrote:
SELECT $1::int + $2::int \bind 1 2 \g
One cast also works, letting type inference figure out the other.
So if I say
SELECT $1::int + $2 \gdesc
it tells me the result will be int. That made me wonder if there is
a \gdesc variant to issue the
On 8/24/23 11:16 AM, jian he wrote:
hi. Can you check my first email about "a" versus "the" and "pg_stat_activity".
I did when you first sent it, and did not make any changes.
also:
"including the `\bind` command, which allows
users to execute parameterized queries (e.g `SELECT $1 + $2`)
On Fri, 7 Jul 2023 at 12:18, Tomas Vondra wrote:
>
> On 7/7/23 11:55, Matthias van de Meent wrote:
>> On Fri, 7 Jul 2023 at 06:53, Dilip Kumar wrote:
>>>
>>>
>>> So IIUC, this parameter we can control that instead of putting the new
>>> version of the tuple on the same page, it should choose
On 2023-Aug-24, Jonathan S. Katz wrote:
> ### Performance Improvements
>
> PostgreSQL 16 improves the performance of existing PostgreSQL functionality
> through new query planner optimizations. In this latest release, the query
> planner can parallelize `FULL` and `RIGHT` joins, generate better
hi. Can you check my first email about "a" versus "the" and "pg_stat_activity".
also:
"including the `\bind` command, which allows
users to execute parameterized queries (e.g `SELECT $1 + $2`) then use `\bind`
to substitute the variables."
The example actually is very hard to reproduce. (it's
The first patch on my "Refactoring backend fork+exec code" thread [0]
changes the allocations of BackgroundWorkerList from plain malloc() to
MemoryContextAlloc(PostmasterContext). However, that actually caused a
segfault in worker_spi tests in EXEC_BACKEND mode.
BackgroundWorkerList is a
Op 8/24/23 om 16:32 schreef Jonathan S. Katz:
On 8/23/23 5:07 PM, David Rowley wrote:
On Thu, 24 Aug 2023 at 05:55, Jonathan S. Katz
wrote:
Hi,
When v15 docs have:
"27.2.7. Cascading Replication
The cascading replication feature allows a standby server to accept
replication connections
On 8/23/23 5:07 PM, David Rowley wrote:
On Thu, 24 Aug 2023 at 05:55, Jonathan S. Katz wrote:
We could add something about 1349d2790 -- do you have suggested wording?
I think it's worth a mention. See the text added in square brackets below:
PostgreSQL 16 improves the performance of
Hi,
Sorry to chime in so lately, I was waiting for some customer feedback.
On Wed, 21 Jun 2023 15:28:38 +0200
"Daniel Verite" wrote:
> At a conference this week I was asked if ICU could be able to
> sort like EBCDIC [2].
> It turns out it has been already asked on
> -general a few years
On 2023-08-24 10:07, Maxim Orlov wrote:
1) Why do I need to specify the number of elements in the list in the
function name?
This is reminding me of something someone (Tom?) worked on sort of
recently.
Ah, yes:
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=1cff1b9
I wasn't
Hi!
Recently, I've been playing around with pg_lists and realize how annoying
(maybe, I was a bit tired) some stuff related to the lists.
For an example, see this code
List *l1 = list_make4(1, 2, 3, 4),
*l2 = list_make4(5, 6, 7, 8),
*l3 = list_make4(9, 0, 1, 2);
ListCell
On 24/08/2023 15:48, Thomas Munro wrote:
LGTM. I vaguely recall thinking that it might be better to keep
EXEC_BACKEND and !EXEC_BACKEND working the same which might be why I
didn't try this one, but it looks fine with the comment to explain, as
you have it. (It's a shame we can't use
On 03.07.23 07:45, Peter Eisentraut wrote:
Here is an updated patch set that adjusts for the recently introduced
named captures. I will address the other issues later. I think the
first few patches in the series can be considered nonetheless.
I have committed the 0001 patch, which was
On Thu, Aug 24, 2023 at 11:41 PM Heikki Linnakangas wrote:
> On 11/07/2023 01:50, Andres Freund wrote:
> >> From: Heikki Linnakangas
> >> Date: Mon, 12 Jun 2023 16:33:20 +0300
> >> Subject: [PATCH 4/9] Use FD_CLOEXEC on ListenSockets
> >>
> >> We went through some effort to close them in the
On Thu, 24 Aug 2023, at 11:05, Daniel Gustafsson wrote:
>> On 4 Aug 2023, at 01:36, Nathan Bossart wrote:
>>
>> On Wed, Jul 19, 2023 at 09:38:12PM +0200, Daniel Gustafsson wrote:
>>> Great, thanks! I had a quick look at this while rebasing (as well as your
>>> updated patch) and it seems like a
Focusing on this one patch in this series:
On 11/07/2023 01:50, Andres Freund wrote:
From: Heikki Linnakangas
Date: Mon, 12 Jun 2023 16:33:20 +0300
Subject: [PATCH 4/9] Use FD_CLOEXEC on ListenSockets
We went through some effort to close them in the child process. Better to
not hand them down
Sorry for the late reply. I was working on David's suggestion.
Here's a response to your questions and also a new set of patches.
On Tue, Aug 22, 2023 at 1:16 PM jian he wrote:
> Hi. I tested it.
> not sure if following is desired behavior. first run with explain,
> then run with
On Thu, Aug 24, 2023 at 1:20 PM Alvaro Herrera wrote:
>
> On 2023-Aug-24, Amit Kapila wrote:
>
> > On Wed, Aug 23, 2023 at 1:31 PM Alvaro Herrera
> > wrote:
>
> > > Hmm, I think if worker->in_use is false, we shouldn't consult the rest
> > > of the struct at all, so I propose to add the
> On 4 Aug 2023, at 01:36, Nathan Bossart wrote:
>
> On Wed, Jul 19, 2023 at 09:38:12PM +0200, Daniel Gustafsson wrote:
>> Great, thanks! I had a quick look at this while rebasing (as well as your
>> updated patch) and it seems like a good idea to add this. Unless there are
>> objections I
Notwithstanding the test errors I am getting for v24-0003, here are
some code review comments for this patch anyway.
==
src/bin/pg_upgrade/check.c
1. check_for_lost_slots
+
+/*
+ * Verify that all logical replication slots are usable.
+ */
+void
+check_for_lost_slots(ClusterInfo *cluster)
On Tue, Aug 22, 2023 at 2:38 PM David Rowley wrote:
> It would be good to see some performance comparisons of the worst case
> to see how much overhead the pruning code adds to Hash Join. It may
> well be that we need to consider two Hash Join paths, one with and one
> without run-time pruning.
On 24.08.2023 11:38, Daniel Gustafsson wrote:
On 24 Aug 2023, at 10:11, Sergey Shinderuk wrote:
I triggered a crash by generating a certificate without a CN and forcing malloc
to return NULL when called from X509_NAME_print_ex or BIO_get_mem_ptr with gdb.
Can you extend the patch with
> On 24 Aug 2023, at 10:11, Sergey Shinderuk wrote:
>
> On 23.08.2023 16:23, Daniel Gustafsson wrote:
>>> On 1 Aug 2023, at 16:44, Sergey Shinderuk
>>> wrote:
>>> A static analyzer reported a possible pfree(NULL) in be_tls_open_server().
>> This has the smell of a theoretical problem, I can't
At Wed, 16 Aug 2023 07:33:29 +, Jimmy Yih wrote in
> Hello pgsql-hackers,
>
> After doing some more debugging on the matter, I believe this issue might be a
> minor regression from commit 5332b8cec541. Prior to that commit, the archiver
> process when first started on a previously promoted
On 23.08.2023 16:23, Daniel Gustafsson wrote:
On 1 Aug 2023, at 16:44, Sergey Shinderuk wrote:
A static analyzer reported a possible pfree(NULL) in be_tls_open_server().
This has the smell of a theoretical problem, I can't really imagine a
certificate where which would produce this. Have
On 2023-Aug-24, Amit Kapila wrote:
> On Wed, Aug 23, 2023 at 1:31 PM Alvaro Herrera
> wrote:
> > Hmm, I think if worker->in_use is false, we shouldn't consult the rest
> > of the struct at all, so I propose to add the attached 0001 as a minimal
> > fix.
>
> I think that way we may need to add
During some refactoring I noticed that the field
IndexInfo.ii_OpclassOptions is kind of useless. The IndexInfo struct is
notionally an executor support node, but this field is not used in the
executor or by the index AM code. It is really just used in DDL code in
index.c and indexcmds.c to
Hi,
On 2023-08-24 08:18:14 +0200, Peter Eisentraut wrote:
> On 23.08.23 14:52, David Rowley wrote:
> > Generally when there are files left over the meson build script will
> > detect this and ask you to run make maintainer-clean. That's useful
> > on Linux, but on Windows you're just left to
On 23.08.23 14:52, David Rowley wrote:
Generally when there are files left over the meson build script will
detect this and ask you to run make maintainer-clean. That's useful
on Linux, but on Windows you're just left to manually remove the
conflicting files which are listed. Unfortunately,
I suggest we rename this setting to something starting with debug_.
Right now, the name looks much too tempting for users to fiddle with. I
think this is similar to force_parallel_mode.
Also, the descriptions in guc_tables.c could be improved. For example,
gettext_noop("Controls when to
On Wed, 23 Aug 2023 at 14:21, Hayato Kuroda (Fujitsu)
wrote:
>
> Dear Vignesh,
>
> > Here is a patch to persist to disk logical slots during a shutdown
> > checkpoint if the updated confirmed_flush_lsn has not yet been
> > persisted.
>
> Thanks for making the patch with different approach! Here
On 24.08.23 00:56, Andres Freund wrote:
Hi,
On 2023-08-23 18:32:26 -0400, Tom Lane wrote:
Andres Freund writes:
There are other potential uses for libpq in pg_regress though - I'd e.g. like
to have a "monitoring" session open, which we could use to detect that the
server crashed (by waiting
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