perfkitbenchmarker/omni_postgres_iaas_relational_db.py [104:127]:
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        f' -c shared_buffers={self.postgres_shared_buffer_size}GB'
    )

    @vm_util.Retry(
        poll_interval=5,
        fuzz=0,
        timeout=self.READY_TIMEOUT,
        retryable_exceptions=(errors.Resource.RetryableCreationError,),
    )
    def WaitUntilReady():
      if not self._IsReady():
        raise errors.Resource.RetryableCreationError('Not yet ready')

    WaitUntilReady()

    self.server_vm.RemoteCommand(
        f'PGPASSWORD={self.spec.database_password} psql -h localhost -U'
        ' postgres -c '
        '"CREATE ROLE %s LOGIN SUPERUSER PASSWORD \'%s\';"'
        % (self.spec.database_username, self.spec.database_password)
    )

  @staticmethod
  def GetDefaultEngineVersion(engine):
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perfkitbenchmarker/timescaledb_iaas_relational_db.py [82:105]:
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        f' -c shared_buffers={self.postgres_shared_buffer_size}GB'
    )

    @vm_util.Retry(
        poll_interval=5,
        fuzz=0,
        timeout=self.READY_TIMEOUT,
        retryable_exceptions=(errors.Resource.RetryableCreationError,),
    )
    def WaitUntilReady():
      if not self._IsReady():
        raise errors.Resource.RetryableCreationError('Not yet ready')

    WaitUntilReady()

    self.server_vm.RemoteCommand(
        f'PGPASSWORD={self.spec.database_password} psql -h localhost -U'
        ' postgres -c '
        '"CREATE ROLE %s LOGIN SUPERUSER PASSWORD \'%s\';"'
        % (self.spec.database_username, self.spec.database_password)
    )

  @staticmethod
  def GetDefaultEngineVersion(engine):
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