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## Problem In `test_storage_controller_many_tenants` we [occasionally](https://neon-github-public-dev.s3.amazonaws.com/reports/main/9155810417/index.html#/testresult/8fbdf57a0e859c2d) see it hit the retry limit on serializable transactions. That's likely due to a combination of relative slow fsync on the hetzner nodes running the test, and the way the test does lots of parallel timeline creations, putting high load on the drive. Running the storage controller's db with fsync=off may help here. ## Summary of changes - Set `fsync=off` in the postgres config for the database used by the storage controller in tests