Re: pg 8.1.3, AIX, huge box, painfully slow.

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Gavin Hamill wrote:
On Fri, 07 Apr 2006 15:24:18 -0500
Scott Marlowe <smarlowe@xxxxxxxxxxxxxxxxx> wrote:

See reply to Tom Lane :)
I didn't see one go by yet...  Could be sitting in the queue.

If it's not arrived by now - EXPLAIN ANALYZE doesn't tell me
anything :)

Let us know if changing the fsync setting helps.  Hopefully that's all
the problem is.

fsync's already off - yes a bit scary, but our I/O is only about
500KB/sec writing.. the whole db fits in RAM / kernel disk cache, and
I'd rather have performance than security at this exact moment..

Multi-Opteron was the other thing we considered but decided to give
'Big Iron' UNIX a whirl...
It still might be a good choice, if it's a simple misconfiguration
issue.

But man, those new multiple core opterons can make some impressive
machines for very little money.

So I see - we could buy two quad-opterons for the cost of renting this
pSeries for a month....

I don't know about the pSeries, but I had a client the other week with the same usage pattern. They made the switch from a quad Xeon to dual (+dual-core) Opteron and were extremely impressed.

I can probably put you in touch with their sysadmin - contact me off-list if you'd like that.

--
  Richard Huxton
  Archonet Ltd


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