We're getting ready to do system upgrades to our postgresql hosting cluster. Currently, we're using 8-core servers with 32 GB of RAM in each to host approximately 75 end user databases per server. I'm wondering if there are particular performance bottlenecks we should be aware of as we scale the hardware up? Does PG handle 64 GB of RAM well? 128 GB? 16 cores? 48 cores? SAS/SATA III with SSDs? (etc.)

A bit of Googling found this thread indicating potential performance issues at 28ish cores a couple years back
http://postgresql.1045698.n5.nabble.com/MIT-benchmarks-pgsql-multicore-up-to-48-performance-td3173545.html

Thanks,

Ben

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