All too often, applications, Web services, and Web sites from multiple departments across the enterprise compete for server resources. Although each of these components may be well-tuned in its own right, an application from another department that is also using the same production clusters may have a poorly tuned query or some other issue, which in turn affects your users or customers.
In the near term, all you can do is work with your system administrators and the department that is having the performance problem to obtain resolution for your users or customers. Longer term, create a community across all of the departments that use the production clusters where your objects are deployed. Work across teams to ensure that there is adequate funding for a staging environment that is truly representative of the mixed workload production environment. Ultimately, you’ll want to develop a series of benchmarks that can be used to validate mixed workload performance in the staging environment.