On Wed, 2023-02-08 at 18:01 +, Mark Hills wrote:
> I've ruled out waiting on a lock; nothing is reported with
> log_lock_waits=on. This is a test database with exclusive access (2.5
> million rows):
>
> This is PostgreSQL 14.5 on Alpine Linux. Thanks.
>
> CREATE DOMAIN hash AS text
>
I've been thinking about the max_wal_senders parameter lately and wondering
if there is any harm in setting it too high. I'm wondering if I should try
to shave a few senders off, perhaps to match my logical replicas + 1,
instead of just leaving it at the default of 10. Or vice-versa, can
clients
Hell postgres people!
This is not an issue report so much as a gripe. I'm on postgres 12.2, so it
is entirely possible that the issue I describe is fixed in a later version.
If so, it is not described in the docs or any posts I can find archived on
pgsql-performance. (I am not brave enough to
On Thu, 9 Feb 2023 at 10:45, Benjamin Tingle wrote:
> Basically- window partition functions don't take advantage of existing table
> partitions. I use window functions as a more powerful GROUP BY clause that
> preserves row-by-row information- super handy for a lot of things.
>
> In particular,
Hi,
On 2023-02-09 06:59:53 +0100, Laurenz Albe wrote:
> On Wed, 2023-02-08 at 18:07 -0500, Rick Otten wrote:
> > I've been thinking about the max_wal_senders parameter lately and wondering
> > if there
> > is any harm in setting it too high.
>
> No, there isn't, except that if you end up having
On Wed, 2023-02-08 at 18:07 -0500, Rick Otten wrote:
> I've been thinking about the max_wal_senders parameter lately and wondering
> if there
> is any harm in setting it too high.
No, there isn't, except that if you end up having too many *actual* WAL
senders, it
will cause load. A high limit
I'm used to adding an empty column being instant in most cases, so my
attention was drawn when it took a long lock.
The timings below imply that each row is running the CHECK?
I've come to expect addition of a NULL column to be fast, and what I'm
seeing seems to contradict the docs [1]:
>
On Wed, Feb 8, 2023 at 11:01 AM Mark Hills wrote:
>
> CREATE DOMAIN hash AS text
> CHECK (VALUE ~ E'^[a-zA-Z0-9]{8,32}$');
>
> devstats=> ALTER TABLE invite ADD COLUMN test hash;
> ALTER TABLE
> Time: 30923.380 ms (00:30.923)
>
Necessarily, I presume because if you decided that the check on
