Yeb Havinga wrote:
> Please remember that particular graphs are from a read/write pgbench
> run on a bigger than RAM database that ran for some time (so with
> checkpoints), on a *single* $435 50GB drive without BBU raid controller.
To get similar *average* performance results you'd need to put about 4
drives and a BBU into a server. The worst-case latency on that solution
is pretty bad though, when a lot of random writes are queued up; I
suspect that's where the SSD will look much better.
By the way: if you want to run a lot more tests in an organized
fashion, that's what http://github.com/gregs1104/pgbench-tools was
written to do. That will spit out graphs by client and by scale showing
how sensitive the test results are to each.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg@2ndQuadrant.com www.2ndQuadrant.us
