Re: continuing daily testing of dbt2 against postgresql - Mailing list pgsql-hackers

Luke Lonergan wrote:
> +1
> 
> Mark, can you quantify the impact of not running with IRQ balancing enabled?

Whoops, look like performance was due more to enabling the 
--enable-thread-safe flag.

IRQ balancing on : 7086.75http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/158/
IRQ balancing off: 7057.90http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/163/

The interrupt charts look completely different.  There's too much stuff 
on the chart to determine what interrupts are from what though. :(  It 
needs to be redone per processor (as opposed to per interrupt per 
processor) to be more useful in determining if one processor is 
overloaded due to interrupts.

http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/158/report/sar/sar-intr.png
http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/163/report/sar/sar-intr.png

But the sum of all the interrupts handled are close between tests so it 
seems clear no single processor was overloaded:

http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/158/report/sar/sar-intr_s.png
http://dbt.osdl.org/dbt/dbt2dev/results/dev4-015/163/report/sar/sar-intr_s.png

Mark