On Thu, May 21, 2009 at 8:59 AM, Matthew Wakeling <matthew@xxxxxxxxxxx> wrote: > On Thu, 21 May 2009, Linos wrote: >> >> i have to buy a new server and in the budget i have (small) i have >> to select one of this two options: >> >> -4 sas 146gb 15k rpm raid10. >> -8 sas 146gb 10k rpm raid10. > > It depends what you are doing. I think in most situations, the second option > is better, but there may be a few situations where the reverse is true. One possible case of this - I believe that 15K drives will allow you to commit ~250 times per second (15K/60) vs. ~166 times per second (10K/60). If you have a lot of small write transactions, this might be an issue. ...Robert -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
