On 1/13/2010 11:36 PM, Craig Ringer wrote:
Robert Haas wrote:
I'm kind of surprised that there are disk I/O subsystems that are so
bad that a single thread doing non-stop I/O can take down the whole
server. Is that normal?
No.
Does it happen on non-Windows operating
systems?
Yes. My 3ware 8500-8 on a Debian Sarge box was so awful that launching a
terminal would go from a 1/4 second operation to a 5 minute operation
under heavy write load by one writer. I landed up having to modify the
driver to partially mitigate the issue, but a single user on the
terminal server performing any sort of heavy writing would still
absolutely nuke performance.
On a side note, on linux, would using the deadline scheduler resolve that?
-Andy
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