Mmm. It seems like the email I thought I'd sent failed to go out.
At Sun, 11 Jun 2023 07:14:54 +0530, Bharath Rupireddy
<bharath.rupireddyforpostg...@gmail.com> wrote in
> On Wed, Aug 24, 2022 at 6:42 AM Kyotaro Horiguchi
> <horikyota....@gmail.com> wrote:
> >
> > At Tue, 16 Aug 2022 18:40:49 +0200, Alvaro Herrera
> > <alvhe...@alvh.no-ip.org> wrote in
> > > On 2022-Aug-16, Andrew Dunstan wrote:
> > > Yeah, I agree with that for advance_wal. Regarding find_in_log, that
> > > one seems general enough to warrant being in Cluster.pm -- consider
> > > issues_sql_like, which also slurps_file($log). That could be unified a
> > > little bit, I think.
> >
> > +1
>
> With the generalized function for find_in_log() has been added as part
> of
> https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=e25e5f7fc6b74c9d4ce82627e9145ef5537412e2,
> I'm proposing a generalized function for advance_wal(). Please find
> the attached patch.
>
> I tried to replace the existing tests with the new cluster function
> advance_wal(). Please let me know if I'm missing any other tests.
> Also, this new function can be used by an in-progress feature -
> https://commitfest.postgresql.org/43/3663/.
>
> Thoughts?
Thanks!
+ "CREATE TABLE tt (); DROP TABLE tt; SELECT
pg_switch_wal();");
At least since 11, we can utilize pg_logical_emit_message() for this
purpose. It's more lightweight and seems appropriate, not only because
it doesn't cause any side effects but also bacause we don't have to
worry about name conflicts.
- SELECT 'finished';",
- timeout => $PostgreSQL::Test::Utils::timeout_default));
-is($result[1], 'finished', 'check if checkpoint command is not blocked');
-
+$node_primary2->advance_wal(1);
+$node_primary2->safe_psql('postgres', 'CHECKPOINT;');
This test anticipates that the checkpoint could get blocked. Shouldn't
we keep the timeout?
-$node_primary->safe_psql(
- 'postgres', "create table retain_test(a int);
- select
pg_switch_wal();
- insert
into retain_test values(1);
-
checkpoint;");
+$node_primary->advance_wal(1);
+$node_primary->safe_psql('postgres', "checkpoint;");
The original test generated some WAL after the segment switch, which
appears to be a significant characteristics of the test.
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
