Why Cloud Postgres SQL instance updates randomly by itself?

[Map]

Hi, 

I check the operation log for our Postgres SQL instance and found out it shows many times - "Update finished", every time it takes about a minute or two which causes a connection to drop if someone using it from the application.

I have no idea what it is, it is not part of the maintenance schedule we setup up.

Does anyone know what is that cause? how to avoid that?

Please see the attached screenshot to see how it looks in the SQL log entry.

Thanks in advance.

[Andres Marquez Rodriguez]

These Update operations would be logged when the configurations of the Cloud SQL have been changed, for example the modifying of the database flags.