Guten Tag Alexey Kovyazin,

nice Questionaire , i would suggest to add 1 more point
if it has a  Raid then the size of the Stripe Set



The Stripe Set ist the amount of data  a raid moves to / from the diskarray for 
every read/write.

Example:
a Raid 5 with 3 Disks and a Stripset of 128 KB means that each Read / Write 
will move 192 KB
now add a Database Page Size of 4 KB (Worst Case)
then every database page read or written will instead move 192 Kb or a 48 fold 
overhead


> Hi All,

> I am a bit tired of repeated topics regarding database performance, so I 
> decided to publish short version of our performance questionnaire:
> http://ib-aid.com/articles/item157

> I suggest to always ask people who come here with Firebird performance 
> problems to answer these questions and send answers to the list, in 
> order to facilitate performance problems resolution.

> Regards,
> Alexey Kovyazin
> IBSurgeon






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Hannes Streicher                            mailto:hstreic...@gmx.de

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