Re: autovacuum

"Scott Marlowe" <scott.marlowe@gmail.com> writes:

> RAID5 optimizes for space, not performance or reliability.  It gets
> faster but less reliable as it gets bigger.  If you can afford the
> space RAID-10 is generally preferred.

RAID5 can be faster for DSS style work loads. If you're writing data to the
raid in large contiguous chunks then it you get higher bandwidth than RAID1+0.

The problem with RAID5 is that if you're writing random access chunks then
it's even slower than not having a raid at all.

--
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com