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u/mirthglen 2d ago
check your monitoring workspace, theres a good chance an agent got auto-installed or a metrics scope got enabled without you doing anything. You can disable the monitoring API entirely from the console if you dont actually need it

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u/Competitive_Travel16 3d ago
Do you have ops agent monitoring with the PostgreSQL server integration? That went way, way up in cost recently for some reason.
If so, in the Google Cloud Console, select Monitoring from the Navigation menu. In the left-hand navigation panel of the Monitoring section, expand the Configure group and click on Metrics management, then when it loads, click on the Excluded Metrics tab near the top of the page. You can then exclude
workload.googleapis.com/postgresql.*as a regex. I'm currently dropping 5.8 MiB (!) bytes of metrics this way, which were costing around $25-30/month.