Hi Marti,thank you for your quick reply.I tried the proposed tweaks and see some differences regarding the measurements. It seems as if the overall query performance dropped a little what I think the disabled turbo boost mode is responsible for (all measurements are single query only). I think that kind of behaviour is somewhat expected.Run1: 26.559sRun2: 28.280sUnfortunately the variance between the runs seems to remain high.In fact I have exclusive access to the machine and I made sure not to run in any i/o related problems regarding buffer caches.Are there any other stumbling blocks I'm missing at the moment?Maybe I've to rethink my (end-to-end) measurement strategy.In your experience how small is it possible to get measurement variances on Postgres?Thank you very much.Kind regards,Dennis
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