Logging slow queries on Google Cloud SQL PostgreSQL instances

Question

The company I work for uses Google Cloud SQL to manage their SQL databases in production.

We\'re having performance issues and I thought it\'d be a good idea (among othe

Answer 1

April 3, 2019 UPDATE

It is now possible to log slow queries on Google Cloud SQL PostgreSQL instances, see https://cloud.google.com/sql/docs/release-notes#april_3_2019:

database_flags = [
  {
    name = "log_min_duration_statement"
    value = "1000"
  },
]

Once you enable log_min_duration_statement, you can view the logs using Stackdriver logging. Select Cloud SQL Database -> cloudsql.googleapis.com/postgres.log and you will see the log like this.

[103402]: [9-1] db=cloudsqladmin,user=cloudsqladmin LOG: duration: 11.211 ms statement: [YOUR SQL HERE]

References:

• Full list of supported flags (CTRL+F for log_min_duration_statement): https://cloud.google.com/sql/docs/postgres/flags#postgres-l
• Issue tracker: https://issuetracker.google.com/issues/74578509#comment54
• PostgreSQL docs: https://www.postgresql.org/docs/9.6/runtime-config-logging.html#GUC-LOG-MIN-DURATION-STATEMENT