2011/5/9 Chris Hoover <revoohc@xxxxxxxxx>: > I've got a fun problem. > My employer just purchased some new db servers that are very large. The > specs on them are: > 4 Intel X7550 CPU's (32 physical cores, HT turned off) > 1 TB Ram > 1.3 TB Fusion IO (2 1.3 TB Fusion IO Duo cards in a raid 10) > 3TB Sas Array (48 15K 146GB spindles) > The issue we are running into is how do we benchmark this server, > specifically, how do we get valid benchmarks for the Fusion IO card? > Normally to eliminate the cache effect, you run iozone and other benchmark > suites at 2x the ram. However, we can't do that due to 2TB > 1.3TB. > So, does anyone have any suggestions/experiences in benchmarking storage > when the storage is smaller then 2x memory? You can reduce the memory size on server boot. If you use linux, you can add a 'mem=512G' to your boot time parameters. (maybe it supports only K or M, so 512*1024...) > Thanks, > Chris -- Cédric Villemain 2ndQuadrant http://2ndQuadrant.fr/ ; PostgreSQL : Expertise, Formation et Support -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
