On 4 Feb 2013, at 12:02am, Paul Sanderson <sandersonforens...@gmail.com> wrote:

> currently using :
> journal_mode = off
> page_size=16386
> cache_size = 10000
> synchronous = off

Reasonable.

> I load lots of similar data sets (each into a separate db) and load time is
> definitely an issue. There are processing delays and loading a db can take
> 30+ minutes, if I can shave off even a few minutes on each run it is worth
> it to my customers

Note that unless you all have identical hardware, the settings which will make 
your computer do it fastest are not necessarily the same settings that will 
make your customers' computers run fastest.

> Trial and error seems to indicate that this works best - but interesed in
> others views.

The thing that's likely to speed that operation up most is switching from 
rotating hard disks to SSD.  If saving that amount of time is that important to 
your customers, that's what they'll do.  If they're not willing to pay the 
extra for an SSD in their own computer, they're probably not willing to pay you 
for your testing and programming time.

On the other hand if you're all already running SSDs you've already taken the 
big step and sorry for wasting your time.

Simon.
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