Scott Marlowe wrote:
random_page_cost = 1# units are one sequential page
fetch
Seldom if ever is it a good idea to bonk the planner on the head with
random_page_cost=1. setting it to 1.2 ot 1.4 is low enough, but 1.4
to 2.0 is more realistic.
Which is probably the
Jim Buttafuoco wrote:
Jan,
I write queries like this
CREATE VIEW parent_childs AS
SELECT
c.parent,
count(c.state) as childtotal,
sum(case when c.state = 1 then 1 else 0 end) as childstate1,
sum(case when c.state = 2 then 1 else 0 end) as childstate2,
Greg Stark wrote:
Jan Dittmer [EMAIL PROTECTED] writes:
You could always do raid 1 over raid 0, with newer kernels (2.6ish)
there is even a dedicated raid10 driver.
Aren't you much better off doing raid 0 over raid 1?
With raid 1 over raid 0 you're mirroring two stripe sets
Joshua D. Drake wrote:
RAID controllers tend to use i960 or StrongARM CPUs that run at speeds
that _aren't_ all that impressive. With software RAID, you can take
advantage of the _enormous_ increases in the speed of the main CPU.
I don't know so much about FreeBSD's handling of this, but on
Neil Conway wrote:
Also, I would imagine Win32 provides some means to inform the kernel
about your expected I/O pattern, but I haven't checked. Does anyone know
of any other relevant APIs?
See CreateFile, Parameter dwFlagsAndAttributes
