Re: [PERFORM] Sustained inserts per sec ... ?

2005-04-05 Thread Christopher Petrilli
On Apr 5, 2005 12:16 AM, Christopher Petrilli <[EMAIL PROTECTED]> wrote: > Looking at preliminary results from running with shared_buffers at > 16000, it seems this may be correct. Performance was flatter for a > BIT longer, but slammed right into the wall and started hitting the > 3-30 second ran

Re: [PERFORM] Sustained inserts per sec ... ?

2005-04-05 Thread Simon Riggs
On Mon, 2005-04-04 at 22:36 -0400, Tom Lane wrote: > Christopher Petrilli <[EMAIL PROTECTED]> writes: > > On Apr 4, 2005 12:23 PM, Tom Lane <[EMAIL PROTECTED]> wrote: > >> do a test run with *no* indexes on the table, just to see if it behaves > >> any differently? Basically I was wondering if ind

Re: [PERFORM] Sustained inserts per sec ... ?

2005-04-05 Thread Christopher Petrilli
On Apr 5, 2005 3:48 PM, Simon Riggs <[EMAIL PROTECTED]> wrote: > > Now some amount of slowdown is to be expected as the indexes get larger, > > since it ought to take roughly O(log N) time to insert a new entry in an > > index of size N. The weird thing about your curves is the very sudden > > jum

Re: [PERFORM] Sustained inserts per sec ... ?

2005-04-05 Thread Christopher Petrilli
On Apr 5, 2005 3:48 PM, Simon Riggs <[EMAIL PROTECTED]> wrote: > B-trees aren't unique to PostgreSQL; the explanation developed here > would work equally well for any database system that used tree-based > indexes. Do we still think that MySQL can do this when PostgreSQL > cannot? How? > > Do we h

Re: [PERFORM] Follow-Up: How to improve db performance with $7K?

2005-04-05 Thread Kevin Brown
Thomas F.O'Connell wrote: > I'd use two of your drives to create a mirrored partition where pg_xlog > resides separate from the actual data. > > RAID 10 is probably appropriate for the remaining drives. > > Fortunately, you're not using Dell, so you don't have to worry about > the Perc3/Di RAID