On Wed, 30 Jul 2008, Dave North wrote:
> Running on HP DL380 w/ 4GB RAM, dual 10K HDDs in RAID 0+1
> Checking the stats, the DB size is around 7.5GB;
Doesn't fit in RAM.
> ...after the load, the DB size was around 2.7GB
Does fit in RAM.
> One observation I've made on the DB system is the disk I/O seems
> dreadfully slow...we're at around 75% I/O wait sometimes and the read
> rates seem quite slow (hdparm says around 2.2MB/sec - 20MB/sec for
> un-cached reads).
That's incredibly slow in this day and age, especially from 10krpm HDDs.
Definitely worth investigating.
However, I think vacuuming more agressively is going to be your best win
at the moment.
Matthew
--
Patron: "I am looking for a globe of the earth."
Librarian: "We have a table-top model over here."
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Librarian: (pause) "Yes, but it's in use right now."