On Thursday, November 21, 2024 17:56 MSK, "Vitaly Davydov" <v.davy...@postgrespro.ru> wrote:
> I'm trying to create a perl test to reproduce it. Please, give me some time
> to create the test script.
Attached is the test script which reproduces my problem. It should be run on a
patched postgresql with the following changes (see below). It is the easiest
way to emulate long checkpoint during high load.
CheckPointBuffers(int flags)
{
BufferSync(flags);
+ pg_usleep(10000000);
}
I used the following command line to run the script, where <postgresqldir> -
the directory with postgresql sources. The module IPC::Run should be installed
as well. PATH and LD_LIBRARY_PATH should be set to a proper postgresql binary
and libraries as well.
perl -I <postgresqldir>/src/test/perl/ restartlsn.pl
Finally, it should produce the following error into the log:
error running SQL: 'psql:<stdin>:1: ERROR: requested WAL segment
pg_wal/000000010000000000000001 has already been removed'
With best regards,
Vitaly
restartlsn.pl
Description: Perl program
