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After cleaning up all our unneeded instances and optimising our architecture, we finally realised that our developer stacks and test environments didn’t need to run 24/7, which has so far been the biggest single cost saving we’ve implemented. By only running stacks from 8am-8pm then stopping everything, we’re getting a 50% saving on our instance costs. If a developer needs a stack they can still launch a new one or start their existing one. We also moved a few test stacks to use single AZ modes instead of multi AZ for another significant saving.

Dialing down our snapshots in non production environments was also a great help to cut our costs.

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