PostgreSQL Bugs

Collected from the PG bugs email list.

Bug ID15682
PG Version11.0
OSUbuntu 18.04
Opened2019-03-09 04:06:47+00
Reported byHaoc Huang

Body of first available message related to this bug follows.

The following bug has been logged on the website:

Bug reference:      15682
Logged by:          Haoc Huang
Email address:      (redacted)
PostgreSQL version: 11.0
Operating system:   Ubuntu 18.04

The [official
recommends to set **checkpoint_completion_target** to **0.9**, which is the
more useful value and improves the performance.
"You can spread those writes out further, lowering the average write
overhead, by increasing the checkpoint_completion_target parameter to its
useful maximum of 0.9  (aim to finish by the time 90% of the next checkpoint
is here) rather than the default of 0.5 (aim to finish when the next one is
50% done).  "

I wonder if the default need to be changed for performance concern. Thanks.


2019-03-09 04:06:47+00PG Bug reporting formBUG #15682: Change default value of checkpoint_completion_target to 0.9 for better performance?