Re: High concurrency same row (inventory)

[MichaelDBA <MichaelDBA@xxxxxxxxxxx>]

Looks like regular updates not HOT UPDATES

Jean Baro wrote on 7/29/2019 8:26 PM:

The dead tuples goes up at a high ratio, but then it gets cleaned.

if you guys need any further information, please let me know!

On Mon, Jul 29, 2019 at 9:06 PM Jean Baro <jfbaro@xxxxxxxxx> wrote:

The UPDATE was something like:

UPDATE bucket SET qty_available = qty_available + 1 WHERE bucket_uid = 0940850938059380590

Thanks for all your help guys!

On Mon, Jul 29, 2019 at 9:04 PM Jean Baro <jfbaro@xxxxxxxxx> wrote:

All the failures come from the Bucket Table (see image below).

I don't have access to the DB, neither the code, but last time I was presented to the UPDATE it was changing (incrementing or decrementing) qty_available, but tomorrow morning I can be sure, once the developers and DBAs are back to the office. I know it's quite a simple UPDATE.

Table is called Bucket:

{autovacuum_vacuum_scale_factor=0.01}

On Mon, Jul 29, 2019 at 3:12 PM Michael Lewis <mlewis@xxxxxxxxxxx> wrote:

Can you share the schema of the table(s) involved and an example or two of the updates being executed?