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@xxxxxxxxxxxxxxx www.2ndQuadrant.us -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
